An overly sized twat. Similar to Fat Amy's vag in Pitch Perfect 2.
Dwam! Fat Amy has a huge TWONK!!
inbetween a "twink" and a "hunk" it can be used in any sentence
Hey Karl you are looking very Twonk today
A special kind of specimen (usually named Lucas) that is so utterly idiotic that retarded doesn’t really give him any justice
Oi you-the one licking the road-get off your arse you twonk.