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.
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.