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1.
The act of texting or IMing someone while you are sitting on the toilet going to the bathroom.
DUDEGUY34: Hey man you heading over for some drinks b4 the bars tonight?

g_lambMan: Yeah dude, ill b after this dumpage has flushed

DUDEGUY34: Ahhh, nasty dude! I didn't know u were chooping w/me

g_lambMan: phew! that was no log i just let out, deff just passed a sequoia
by warno January 28, 2009
 
2.
When Chad or Clair exchange butt-mud in, on or around each others body parts in a sexual manner.
Chad is pooping (chooping) on Clair's face.
by chaids January 04, 2009