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1.
The act of defecating in one's own trousers
Greg Oden POOPED HIS PANTS!!!! POOP! POOP! POOP! POOP! POOP! POOP!
by SuperMulan August 12, 2008
 
2.
When someone seems so surprised or out of character when receiving information, it looks like they could have pooped their pants in shock.
Yo, did you see Matt's face when his babe told him their baby wasn't his?

Yeah man, he totally pooped his pants.
by DizzyAH March 08, 2009