Cartman's aunt who visits his mom every month. She has perkinsons disease.
I hate when aunt flo comes
by carly cline December 25, 2005
3 more definitions
a womans menstral period!
Aunt flo's in town! so I may go get my red wings
by mooseknuckles October 25, 2002
A female's monthly period.
I'm bummed because Aunt Flo arrived last night.
by SAgent September 30, 2005
a woman's menstrual period
Don't mind her. She's just mad because Aunt Flo is here and she's out of pads.
by Light Joker December 28, 2005