+1 Dangerous Dave
There was a kid a few years below me in school that ended up with that moniker, who was, for want of a better expression ‘a few sandwiches short of a picnic’. Generally functioned ok as a human being, but very volatile, aggressive if provoked and hugely unpredictable. Was always fighting, smashing stuff, having outbursts.
He now rides around on a 50cc moped flat out (20mph….) staring at people and nearly getting himself knocked down most days.
Edit: +2
Another Dave I went to college with ended up with the same tag, he played a lot of football, rode a lot of bmx/dirtjump, smoked a LOT of weed, drank lot of cheap cider. Ruptured his spleen a couple of years back while either pissed or stoned attempting a jump on a kids bmx up the local park, handlebar hit him in the guts, nearly died. Famous in his town for pulling off a ‘roof gap’ on his beemex at the secondary school.