Derived from the English 'twat', increasingly popular from the late 90s onwards amongst urban speech impediment societies, especially the Society for Hindered and Impedimented Terms (SHIT) who are rumoured to have invented it to keep up with rising London demands for so-called 'Impedi-swear words'
by Niceday October 22, 2003

by Joe Bob October 21, 2003

Then I reached over and thwapt him on the head
by mergerrr October 21, 2003

Currently defined as the sound you hear when you backhand your girlfriend for mixing up your laundry colors.
by Detman101 October 22, 2003
