A reference to semen inside a male's pants or shorts that results from a close encounter with a stripper (lap dance) or other exciting moment that resulted in one "jizzing in their pants". Usually leaves a wet spot visible from outside the clothing, and can often be felt inside the pockets.
As in "Wow, that girl was so hot! I just dropped a pound of pocket jelly thinking of her!"
by bazzr July 29, 2010