wouldnt

(I) wouldn't count on it

A phrase cautioning one against expecting something. I overheard some of the bosses talking, and I wouldn't count on a Christmas bonus this year.
See also: count, on

(one) won't hear of (something)

One is adamant that something will not happen; one refuses to allow something (to happen). A: "I'd like to pay for dinner to thank you for your generosity." B: "I won't hear of it, my boy! You are our guest." My mother won't hear of us going to an out-of-state college.
See also: hear, of

I wouldn't wish (something) on a dog

The thing being discussed is so bad or unpleasant that no one deserves to be subjected to it, not even an animal. I wouldn't wish cancer on a dog. No one should have to go through that.
See also: dog, on, wish

if a toady frog had wings, he wouldn't bump his ass

rude slang A phrase that advises against wishing for impossible or absurd things to happen. A: "If only my parents would give me a car, life would be so much easier." B: "Yeah, and if a toady frog had wings, he wouldn't bump his ass."
See also: ass, bump, frog, he, if, toady

if frogs had wheels, they wouldn't bump their butts

A phrase that advises against wishing for impossible or absurd things to happen. A: "If only my parents would give me a car, life would be so much easier." B: "Yeah, and if frogs had wheels, they wouldn't bump their butts."
See also: bump, butt, frog, if

if frogs had wings, they wouldn't bump their butts (when they hop)

A phrase that advises against wishing for impossible or absurd things to happen. A: "If only my parents would give me a car, life would be so much easier." B: "Yeah, and if frogs had wings, they wouldn't bump their butts. It's not gonna happen, dude." Who knows, maybe the boss will listen to reason for once. Yeah, right, and if frogs had wings, they wouldn't bump their butts when they hop!
See also: bump, butt, frog, if
Farlex Dictionary of Idioms.

If frogs had wheels, they wouldn't bump their butts,

 and If a toady frog had wings, he wouldn't bump his ass.
Rur. It is useless to wish for impossible things. (Use caution with ass.) Tom: If I had two hundred thousand dollars, I could buy that farm. Jane: Yeah, and if frogs had wheels, they wouldn't bump their butts. Charlie: If I were rich and famous, I'd make people listen to me. Bill: If a toady frog had wings, he wouldn't bump his ass.
See also: bump, butt, frog, if
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (I) wouldn't count on it
  • (as) sure as eggs (is eggs)
  • be to do with (something)
  • be/have to do with somebody/something
  • a penny for them
  • sugar the pill
  • sugar/sweeten the pill
  • be twiddling (one's) thumbs
  • be twiddling your thumbs
  • eggs is eggs