A young uncouth Japanese woman (often a Kogal/ganguro type) who screams into her mobile phone (known as a keitai in Japan) while in public - especially on trains or in restaurants.

Keitai - mobile phone
Banshee - a mythical woman who kills by screaming in such a high pitch that it breaks glass and the arteries of its victim's body so that they drown in their own blood.
"If that keitai banshee at the end of this carriage doesnt shut up in a moment, I am going to plant my foot in her ass"

"I am so tempted to grab that keitai banshee's phone and snap it in half"

by Kraken December 2, 2007
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when a woman gets on her period but unlike regular times this time she goes apeshit.
Girl: My stomach hurts buy me some crackers.
Guy: Its midnight thats ridiculous we don't even have crackers.
Girl: (slap) I don't care get me some god damn crackers!
Guy: WTF you such a period banshee!

Girl: I am gonna slit your throat!
Guy: FML
by dedodude January 27, 2011
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When you stick your penis in a girls anus, while puting all 10 fingers in her vagina
I gave Ashley D. a screaming Banshee.
During intercourse my partner requested i give her a Screaming Banshee.
by Screaming Banshee August 23, 2008
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(Alkaloid slang) A hinque and/or attractive person of the female persuasion. See also witchy.
Scout, that banshee you're happenin' with is the tontay!
by Brock Guilfoyle January 4, 2006
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Local women notorious for getting too drunk and peeing the bed/ couch/ etc. after intercourse.
"Dude, I woke up the next morning with piss all over my bed and she was gone."
-"The Pee Banshee got you too!"
by Social Sound System November 21, 2007
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fucking attack from the sky!
Goes hard
player
i'm coming at you like a fucking banshee
she licked it like a banshee
you a fucking banshee
by imma banshee September 4, 2011
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To wail, cry, howl, or scream like a wild animal or an actual banshee derive from the Gaelic folklore.
Stop all that wailing! Sounding like a dang screeching banshee.

Man that dog sounds just like a screeching banshee.
by tr0219 August 14, 2009
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