ridin' a chopper
The guy sits on a chair and the girl sits on his dick and lays right back onto the floor and puts her legs in the air, the guy then grabs her feet like handle bars and starts to make motorbike sounds while he pounds her like a 2 stroke on methanol
Christmas lunch would never be forgotten when Jim and Shannon (a.k.a shazza) showed the kids how dad looked "ridin' a chopper"