labia majora and / or labia minora
"Man, that girl isn't wearing panties, you can see her flip flaps!"
by RealSchoolSupplies May 01, 2007
My flip flap! I'm coming back for my flip flap
by pu pang January 22, 2011
An alternate word for 'flip-flops', commonly used by African American males in the southeastern United States.
"Rerun! Make sho you put on yo flip-flaps befo you git on da beach!"
by Justin December 15, 2003