Top Definition
When a person laughs so hard their bowels quiver and they shit their pants.
I saw Richard Pryor on tv last night. I laughed so hard I had a backdoorgasm and had to change my underwear!
by afallenmind May 05, 2011
the result of reaching climax while receiving anal sex
Larry gave Ted his very first backdoorgasm.

I achieved a backdoorgasm with the help of my girlfriend's dildo.
by theironman63 May 11, 2010
buttsecks, specifically to cum inside your partner's bum.
I had a total backdoorgasm all in your mom's rump!
by murderbreath March 11, 2009

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