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2.
Taking a poop, but not just any poop, numerous plops of poop. Hense the name "dropping off the kids".
My sister had to drop off the kids after she had ate too much food.
by Errrrrrin July 31, 2005
 
1.
to have a shit
'i'll be back in a sec, i'm just gonna drop off the kids'
by RB November 29, 2003