gun

gun

1. verb, slang (of a vehicle) To accelerate or increase speed suddenly or rapidly. Okay, I've got the cash. Now gun it and get us out of here!
2. noun, slang One who has been hired to kill someone. The boss will have a hired gun to take care of the informant, don't worry.
3. noun, slang A particularly muscular arm; an arm's large bicep. Usually used in the plural in reference to both arms or both sets of biceps. He always wears tank tops so he can show off his guns. I caught her flexing her guns in front of the mirror after her workout.
4. noun, slang An important, successful, or influential person. He's the gun at the law firm; he wins every court case he gets. After failing to convince the IT department that implementing new network security controls would be in everyone's best interest, Mike felt it was time to bring in the big guns, so he called a company meeting with the executive board.
Farlex Dictionary of Idioms.

gun

1. n. a hired gunman; a bodyguard, an assassin, or a member of a gang of criminals. (Underworld and Western.) Willie and his guns came by to remind Gary of what he owed Mr. Gutman.
2. n. a leader; the key member of a group. Who’s the gun around here?
3. tv. to race an engine; to rev up an engine. See how loud it is when I gun it?
4. Go to guns.

guns

n. the biceps; large muscular arms. (see also pythons.) He lifts weights to build up his guns.
See also: gun
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See:
  • (as) sure as a gun
  • a big gun
  • a smoking gun
  • a/the smoking gun
  • a/the son of a gun
  • all guns blazing
  • at gunpoint
  • be going great guns
  • be gunning for
  • beat the gun
  • big cheese
  • big gun
  • blow great guns
  • call shotgun
  • don't jump the gun
  • eat (one's) gun
  • eat one’s gun
  • Give it the gun
  • give it/her the gun
  • glass gun
  • go down with guns firing
  • go great guns
  • going great guns
  • great gun
  • great guns
  • great guns, going
  • gun
  • gun down
  • gun for
  • gun for (someone or something)
  • gun for someone
  • gun it
  • gunboat
  • gunning for (someone or something)
  • guns
  • gun-shy
  • have a gun to (one's) head
  • have a gun to your head
  • hired gun
  • hold a gun to (one's) head
  • hold a gun to head
  • hold a gun to someone's head
  • hold a pistol to (one's) head
  • hold/put a gun to somebody's head
  • in the gun
  • is that a (something) in your pocket or are you just pleased to see me
  • Is that a (something) in your pocket, or are you just happy to see me?
  • jump the gun
  • jump the gun, to
  • kill a fly with an elephant gun
  • pack a gun
  • packing a gun
  • pull a gun
  • pull a gun on (one)
  • put a gun to (one's) head
  • put a gun to (someone's) head
  • put a pistol to (one's) head
  • Quaker gun
  • smoking gun
  • son of a gun
  • spike (one's) guns
  • spike somebody's guns
  • spike someone's guns
  • stand by (one's) guns
  • stare down the barrel of a/(one's) gun
  • stick by (one's) guns
  • stick to (one's) guns
  • stick to guns
  • stick to one's guns
  • stick to one's guns, to
  • stick to your guns
  • the smoking gun
  • throwdown gun
  • top gun
  • under pressure
  • under the gun
  • with (one's) guns blazing
  • with all guns blazing
  • with guns blazing
  • zip gun
References in classic literature
All the guns, without waiting for orders, were being fired in the direction of the conflagration.
In their childlike glee, aroused by the fire and their luck in successfully cannonading the French, our artillerymen only noticed this battery when two balls, and then four more, fell among our guns, one knocking over two horses and another tearing off a munition-wagon driver's leg.
War and Peace
One invented a gun, and hardly was it cast, when one hastened to try it in the face of the enemy!
Those fellows believe that one can't become a general without having served first as an ensign; which is as much as to say that one can't point a gun without having first cast it oneself!"
From The Earth To The Moon
To put all twenty yoke of us to the big gun as soon as Two Tails trumpets." ("Two Tails" is camp slang for the elephant.)
Then we tug the big gun all together--Heya--Hullah!
Jungle Book
But there were all our stores at the bottom, and to make things worse, only two guns out of five remained in a state for service.
Treasure Island
The honorable secretary of the Gun Club wished himself to observe the vehicle of his daring friends.
Round The Moon
The slanting rays of the sun were still hot; his clothes, soaked through with perspiration, stuck to his body; his left boot full of water weighed heavily on his leg and squeaked at every step; the sweat rain in drops down his powder-grimed face, his mouth was full of the bitter taste, his nose of the smell of powder and stagnant water, his ears were ringing with the incessant whir of the snipe; he could not touch the stock of his gun, it was so hot; his heart beat with short, rapid throbs; his hands shook with excitement, and his weary legs stumbled and staggered over the hillocks and in the swamp, but still he walked on and still he shot.
Picking up his gun and his hat, he called Laska, and went out of the swamp.
Anna Karenina
They were described as "vast spiderlike machines, nearly a hundred feet high, capable of the speed of an express train, and able to shoot out a beam of intense heat." Masked batter- ies, chiefly of field guns, had been planted in the country about Horsell Common, and especially between the Woking district and London.
Guns were in rapid transit from Windsor, Portsmouth, Aldershot, Woolwich-- even from the north; among others, long wire-guns of ninety- five tons from Woolwich.
War Of The Worlds
"I have nothing left me but to take my gun. At all events, I will go where you go."
20000 Leagues Under The Sea
The Vaterland at that time was beating up to the south of City Hall from over the ruins of the Brooklyn Bridge, and the reports of the gun, followed by the first crashes of the collapsing Dexter building, brought Kurt and, Smallways to the cabin porthole.
The War in the Air
"Order the guns," Rivera said, and thereupon was guilty of the longest flow of words they had ever heard him utter.
The Night Born