get it off with

get it off with (someone)

vulgar slang To have sexual intercourse with someone. Teenagers are under a huge amount of pressure from their peers to get it off with someone before they feel ready or really want to. Well, she didn't come home last night, so I bet she got it off with that cute guy at the bar.
See also: get, off

get off with (something)

1. To be acquitted of or escape punishment for some crime by incurring a lesser sentence or punishment instead. Despite damning video evidence, the suspect got off with a misdemeanor, serving no time in jail. The wealthy actress got off with just a $3,000 fine.
2. To cause or allow someone to be acquitted of or escape punishment for a crime by having them incur a lesser sentence or punishment instead. In this usage, a noun or pronoun is used between "get" and "off." Everyone thought the CEO was heading to jail, but his slick lawyer got him off with a small fine and six weeks of probation. Thankfully, my attorney was able to get me off with rehab.
See also: get, off
Farlex Dictionary of Idioms.

get it off with someone

Sl. to have sexual intercourse with someone. She said she wanted to get it off with him. She said all he wanted was to get it off with just anybody.
See also: get, off
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • a stranger to (someone or something)
  • be out of (one's) league
  • be out of somebody's league
  • be in bad with (someone)
  • (one) puts (one's) pants on one leg at a time
  • bargain
  • bargain for (someone or something) with (someone)
  • brief (someone) about (someone or something)