verb. (i) The act of spending time with one's girlfriend/female partner instead of choosing to do so with male friends.
(ii) The act of sexual intercourse.
Can be used in many forms.
Guy 1: "Coming out later for a few beers?"
Guy 2: "Nah sorry, I'm pooning"
Guy 1: "Are you pooning later?"
Guy 2: "Ye we're going for dinner"
Guy 1: "Bender!"
Guy 1: "Where'd you end up last night?"
Guy 2: "Went back to mine with that bird I was with"
Guy 1: "Did you poon?"
Guy 2: "Nah, got head though"
Guy 1: "Lad!"