Defecate. It's derived from a combination of the curve ball in baseball typically being called the 2 pitch, and the denotation of urination as number 1 and defecation as number 2. Thus, to pitch a curveball means to do a number 2.
Get out of my way, after drinking that coffee I really have to go pitch a curveball.
by johnnybass October 03, 2008