Fat Charlie 

A rolled marijuana cigarette

Hey bro roll me up a fat charlie.

Fat Charlie by D Nastie August 7, 2008

Fat Charlie 

You’ll know it when you see it.

My cat is a real Fat Charlie.

Fat Charlie by Urban Thiccionary March 23, 2019

Fat Charlie 

A Fat Charlie is when a Chad has an abnormally large penis size Usually ranging from 2.34 inches to 3.76.(Erected)

Damn that Chad has a Fat Charlie

Fat Charlie by TreeTrunckThomas64209 December 15, 2017