have it off/away with somebody

have it away (with someone)

To engage in sexual intercourse (with someone). Primarily heard in UK. I wouldn't have it away with someone you work with—it will only make things really complicated at the office. I can hear my neighbors having it away at night—it's really embarrassing!
See also: away, have
Farlex Dictionary of Idioms.

have it ˈoff/aˈway with somebody

(British English, slang) have sex with somebody
See also: away, have, off, somebody
Farlex Partner Idioms Dictionary
See also:
  • have it away
  • have it away (with someone)
  • have it away with
  • have (one's) end away
  • get (one's) end away
  • get your end away
  • get it off with
  • get it off with (someone)
  • get/have your end away
  • get (one's) ashes hauled