get to first with someone

get to first base with (someone)

slang To kiss someone. The term likens sexual acts to "hits" in baseball, in which a player advances to each base on the way to "scoring"—a slang term for engaging in sexual intercourse with someone. A: "Did you get to first base with Dave last night?" B: "A lady doesn't kiss and tell!"
See also: base, first, get
Farlex Dictionary of Idioms.

get to first with someone

verb
See get to first base with someone
See also: first, get, someone
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • get to first base with (someone)
  • get to first base with someone
  • 20
  • 420
  • twenty
  • chedda
  • girl Friday
  • half term
  • damn Yankee
  • Yankee