Bits of blood clots found during a womens menstrual flow.
Gee, Jamie! What's that stuck between your teeth? Looks like a menstrualberry to me!
by SemiMicro August 11, 2006
A menstrualberry is a blood clot found in a womens tampon. It may or may not contain other excrement such as nuggets from a yeast infection, or semem.
What the heck is that in your moustache, Billy? Could that be a menstrualberry?
by Bustin Nuts Loose August 14, 2006