Twat

Twat is British slang for the vagina.
Found on http://www.probertencyclopaedia.com/browse/ZT.HTM

Twat

The word twat is a vulgar synonym for the human vulva, but is more widely used as a derogatory epithet, especially in British English. The word may originate from Old Norse þveit meaning cut, slit, or forest clearing. == Historical usage == Robert Browning famously misused the term in his 1841 poem `Pippa Passes`, believing it was an item of nu.....
Found on http://en.wikipedia.org/wiki/Twat

twat

vagina
Found on http://www.noslang.com/dictionary/t/

Twat

Another word used to insult someone who has upset you. Also means the same as fanny but is less acceptable in front of your grandmother, as this refers to parts of the female anatomy. Another use for the same word is to twat something, which would be to hit it hard. Get it right or I'll twat you over the head!
Found on http://www.effingpot.com/slang.shtml
No exact match found