When two raging lesbians get naked and strap dildos to their foreheads, they get down on all fours and crawl around trying to penetrate each other.
My lesbian roommate tried playing screwnicorns and ended up finding out she likes anal.
by zwicks December 17, 2004
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1. (noun) a lesbian with a dildo strapped to her forehead

2. (verb) to penetrate another with a dildo strapped to ones forehead, like a crazed unicorn.

3. (verb) to battle a rival lesbian to near death by clashing forehead dildos in a stag-like manner.
1. The screwnicorn winced as her dildo hit the doorframe.
2. The whiplash injury was a result of a drunken screwnicorn.
3. The angry girls had a screwnicorn over the hot chick.
by CeltGal April 3, 2007
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1. to penetrate another with a dildo strapped to ones forehead, like a crazed unicorn.

2. to battle a rival lesbian to near death by clashing forehead dildos in a stag-like manner.
1. The whiplash injury was a result of drunken screwnicorning.
2. The angry girls were screwnicorning over the hot chick.
by CeltGal April 3, 2007
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When a dyke puts a strap-on on her forehead and then proceeds to place the dildo in another persons orifice.
Large Marge wanted to try something new with her lesbian lover, Roxy, so she slapped that bad boy to her forehead and then went at her stinky meat wallet like a jackhammer going at cement.
by NastyBrett December 11, 2003
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When a dyke puts her strap-on dildo on her forehead and proceeds to go at her partner like a crazed unicorn.
i wish I had a screwnicorn
by ryan P December 15, 2003
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When a lesbian puts a strap-on on her forehead than proceeds to pleasure her partner
"The dyke preformed teh screwnicorn on her girlfriend
by Adam March 9, 2003
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when you put a strap on dildo on your head and fuck a girls vagina with your head
turn into a screwnicorn and fuck me with your head!
by dogisadildoluvr January 1, 2010
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