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Also See "Haunch it up". The act of expelling a very large amount of crap after having held it in for far too long.

Haunching up can take anywhere from 10 minutes to 1 hour. Prolonged periods of haunching up may lead to back problems and hemorrhoids.
Andi: Where's Kelsey? I haven't seen her for 2 hours.
Ralph: She's in the bathroom "haunching up". Probably gonna clog up the toilet again!
by Ralph M. Frichtl December 25, 2009

Words related to Haunching Up

butt fire butt load crap dump dumping haunch it up load shit