A fusion of the already very expressive words twat and wanker to describe a peculiar, even unique, kind of contemptibleness found in those who are both stubborn and awkward, awkward and stubborn.
Noun: Someone thought by another to be a fool, an idiot, or someone whose behaviour is in some way unacceptable (but not illegal or overly troublesome) to the norms of the majority in the vicinity.
Etymology: derived from 'wanker' but thought to be less offensive.