Wobhead
A person of low intelligence/ a highly stupid individual. Popularised by 13 year olds in the video game Fortnite. Also a direct translation for 'knob-head' or 'idiot.'
Person 1: Ah I hate that Tom guy so much!
Person 2: I know right - he's such a wobhead!
Person 2: I know right - he's such a wobhead!