1 definition by FearTehSpork

Top Definition
To insert ones thumb in their anus. Not restricted to certain activites. Can happen just because.
Carl told us last night he was thumbing the dungeon while he watched a recorded episode of "The View"
by FearTehSpork May 11, 2010

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug