Top definition
n. a long, submarine shaped turd that is crapped out before, during, or immediately after sex....beneath the bed sheet covers.

The undercover sub slinks, slithers, and slides across the sheets until it comes into contact with one's sexual partner...causing a multitude of reactions which may include, but are not limited to: excitement, anger, fear, frustration, confusion, bewilderment, angst, mild and/or severe depression.
Last night after I did it with Janie, I swear I heard her shart. No sooner had I smelled the crap, then an undercover sub appeared out of nowhere...spreading across my leg like a wet, stinky rash. It ruined the new bed sheets!
by Dr. Josephus May 03, 2011
Get the mug
Get a Undercover Sub mug for your buddy Trump.
Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
via giphy
by ecogoth December 30, 2020
Get the mug
Get a dirtpilled mug for your fish Paul.