What is Twat Crash?
1.
To have a twat crash: To totally freak out, either in anger, panic or fear.
or
To crash one's twat
Jonny had a total twat crash when he discovered somebody had urinated in his glass of Mountain Dew.
When Royston saw the word 'WANK' painted in big red letters on the bonnet of his mum's car, he crashed his twat.
See