Absolute twat. A mix between a twonk (family friendly version of twat) and a wonka bar. Friendly insult
Person 1: yo this person shagged my mum
Person 2: what a twonka bar
A mix between a twonk and a wonka bar (tasty btw) playful insult that I made up.
Ellis: do u like my 200 pound pink jumper?
Euan: no u twonka bar