knock boots

knock boots (with one)

euphemism To have sex (with one). My roommate in college used to hang a hat on the door handle outside our room if she was knocking boots with someone inside. I could tell he was more interested in knocking boots than in having any kind of serious relationship.
See also: boot, knock
Farlex Dictionary of Idioms.

knock boots

tv. to copulate. He said he wanted to knock boots with her.
See also: boot, knock
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • bat for both teams
  • be intimate with (someone)
  • forget you
  • Forget you!
  • carnal
  • die by (one's) own hand
  • die by own hand
  • the N-word
  • maker
  • do what comes naturally
References in periodicals archive
If he wants to knock boots however, that is his business."
Monogamy and fidelity are put to the test, as self-proclaimed romantic Mitchell gets more than his share of offers to knock boots with a long list of B-boys.
Not only is he reunited with his love interest Ramada (Valeria Golino), but he also gets to knock boots with CIA glamour puss Brenda Bakke in nutty spoofs of No Way Out and Basic Instinct.