A ‘twat’ is a crude urban slang term used to describe female genitalia and is intended as a derogatory term when directed at an individual.
The plural version ‘twats’ is often used when referring to a group of idiots, cretins or imbeciles.
The term has risen to prominence as a result of England and Chelsea footballer Ashley Cole referring to the English Football Association governing body as a ‘Bunch of Twats’ in a tweet (shown below).
Some people might even suggest that Cole could be considered as one such individual himself!
Another extension of the word is ‘twatting’ or ‘twatted’ – which refers to the hitting of someone, e.g. “I twatted him in the face”.