Definition one: When a girl puts a jack o’ lantern on her head with a mouth hole cut big enough to suck dick.
Definition two: When a man inserts his penis into the bottom of the pumpkin with all it’s innards and finishes inside; then pumpkin guts and seeds stick to his dick once removed.
He wanted foreplay on Halloween night so she grabbed the pumpkin and gave him a sloppy pumpkin.
Over Halloween, his wife was out of town, so he performed a sloppy pumpkin and roasted the seeds afterwards.
The sexual act of achieving orgasm by using a rotting pumpkin as a makeshift male masturbatory aid.
I was taking out the trash and I caught my roommate giving himself a sloppy pumpkin with the jack-o-lanterns we threw out a few weeks ago. Ugh, it's almost Christmas, it was nasty.