A girl or woman that has a penis.
"Is that a man or a woman?" "Neither, it's an inbetweenis."
by th030 July 10, 2009
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Someone whose hair is frizzy, puffy, curly, unmanageable, and definitely not straight or silky...
INBETWEENY-BOPPERS UNITE!!!!
by rmsk12 May 14, 2011
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The state of not knowing what day it is during the early hours of the morning when you have stayed up all night and when you don’t know what to call it.
Edna Mode: “IS IT WEDNESDAY OR THURSDAY”

Her Sexy Bf: “It’s the inbetweeniness bitch 🙄”
by Edna Mode’s Boyfriend Jerome February 18, 2021
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A half boned dick that is to soft to go into a vagina, but it stands up on its own
Small Dick inbetweeny weenie
by pinhead larry69 March 26, 2010
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