noun Slang: Vulgar.
Origin of twat
1650–60; perhaps orig. dialectal variant of *thwat, *thwot, presumed Modern English outcome of Old English *thwat, akin to Old Norse thveit cut, slit, forest clearing (> E dial. (N England) thwaite forest clearing)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun taboo, slang
the female genitals
a girl or woman considered sexually
a foolish or despicable person
Word Origin for twat
of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1650s, of unknown origin. A general term of abuse since 1920s.
The T-word occupies a special niche in literary history, however, thanks to a horrible mistake by Robert Browning, who included it in 'Pippa Passes' (1841) without knowing its true meaning. 'The owls and bats,/Cowls and twats,/Monks and nuns,/In a cloister's moods.' Poor Robert! He had been misled into thinking the word meant 'hat' by its appearance in 'Vanity of Vanities,' a poem of 1660, containing the treacherous lines: 'They'd talk't of his having a Cardinalls Hat,/They'd send him as soon an Old Nuns Twat.' (There is a lesson here about not using words unless one is very sure of their meaning.) [Hugh Rawson, "Wicked Words," 1989]
Online Etymology Dictionary, © 2010 Douglas Harper