Much like a blumpkin where you get blowy while dropping off a SEAL team, its when you jack off and take a shit at the same time because you're stuck in some third world shithole or... your parents house.
dude 1 walks into the bathroom
dude 1: hey man, hows it going? you've been in here a minute.
dude 2: it was going good until you interrupted my jumpkin
dude 1: hey man, hows it going? you've been in here a minute.
dude 2: it was going good until you interrupted my jumpkin
by 9223-beotch April 04, 2013