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To lose any/ all control of bowels, especially to defecate on floor.

Can also mean to do something bad and then hang around a few hours, not helpping clean up.

(This term is in common usage at Southridge, in Beaverton, OR)
"Ohhh he just T-Shapped" on the floor!"
or
"Yeah dude I i puked on the mirror and broke the desk, then i T-Shapped for a while."
T-Shapp by James Vanderbal August 31, 2008
Related Words
That’s so thapp of you
Thapp by The THAPPER November 2, 2023
oh my god she is a tsappa
tsappa by drfrou November 27, 2007
Obsessing over a person or a thing
When Rachel first said hello , I started thapping at that very moment
Thapping by Savagekiid47 March 20, 2019

Thapping Sound 

The sound, in the form of a rapid staccato, made by the slapping of a guy’s ball bag against the girl’s ass during sexual intercourse. The sound can also be made by the slapping of thighs. The thapping sound is usually accompanied by other fuck noises like moaning, groaning and heavy breathing.
I heard the thapping sound coming from their bedroom and I knew my parents were having sex again.

They let us out of work because of the approaching storm. Instead of going to the bar with the guys I decided to go home early and be with my wife. When I got to the top of the stairs I heard the thapping sound coming from our bedroom.

When I fuck Gina she gets really turned on when as soon as she hears the thapping sound and then she goes all out until she comes.
Thapping Sound by RobbieJor April 7, 2005
V. The process of masterbating and having your balls slap against your thighs making a clapping sound.
"Jerry had a good time last night, I could here him thapping."
thapping by 2BallDUckling May 31, 2014