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2.
A female's monthly period.
I'm bummed because Aunt Flo arrived last night.
by SAgent September 30, 2005
 
1.
a womans menstral period!
Aunt flo's in town! so I may go get my red wings
by mooseknuckles October 25, 2002
 
3.
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
 
4.
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