Top definition
when ones thighs seem to only grow, even when the person exercises and diets.
person a: dude so you know how i lost all that weight?
person b: yeah.
person a: so i went shopping to get new clothes and i couldn't get any pants over my thighs, even though i have lost weight.
person b: man sounds like you have come down with a classic case of thunder thighitis.
by Alex Sehlinger January 30, 2009
Mug icon

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