Definitions by superawesomeguy1496

Matt Damon Effect 

Visionary yo-yo dieting in which you sometimes appear very buff to your friends, and sometimes you appear very fat.

"What's going on with Steve? He had a beer belly last week, and now he has abs."
"I don't know man, I think he's having a Matt Damon Effect"

Matt Damon Effect by superawesomeguy1496 October 6, 2011