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1.
Ween: Short for weiner; a large, erect member; male sexual reproductive organ; genitalia
or
Ween: To flash a completly unnessesary limp penis in a movie scene.

Hella: It is commonly used in place of "really" or "very" when describing something.

Hellaween: The day before Halloween, October 30th. Participants flash their limp penis' to unsuspecting passersby.
Dude, Halloween was awesome, but Hellaween was so cool. I showed my penis to everyone!
by Hellaween February 22, 2010