The act of simply saying the word "roadhouse" during or immediately after the moment of sexual climax.
The word roadhouse may/should be delivered in the deadpan style or manner of Seth MacFarlane as the voice of Peter Griffin from the television show Family Guy (see Season 8 Episode 4)
Roadhousing may be delivered at the precise moment of climax, or after a dramatic pause.
May also accompany skeet shooting.
A common example of Roadhousing:
Person A: Oh baby, ooh, I love you, I loooove you. Gawwwwd geeez urrrrrrg (etc. to climax)
Person B: Roadhouse.