wretch out 

to bail on an event or activity due to sheer wretchedness

Dude, you're coming to the party, right?
I don't know, I may have to wretch out.

wretch out by J. Bond August 24, 2006

take a wrench out of the oven 

to take a dump; to do #2; to take a smash

I'm going to take a wrench out of the oven.

take a wrench out of the oven by wild_bill34 November 14, 2009