To take a shit. There is no indication as to how severe of a shit but it is usually assumed to be a short one considering the context the phrase is used.
Dude, I'll be over in a bit. I just gotta drop some friends off at the pool first.
by IshotTheSheriffbutNotTheDeputy September 24, 2008
I've really got to drop some friends off at the pool!
by mafioso March 23, 2003