Definitions by Rick Conant

onslow 

A synonym for 'bad'. Something that is onslow can mean that it is of a lower standard compared to something, or can also mean that it is undesirable.

'That is so onslow!'
'This school is onslow!'
'This place is teh onslow!' (when used in leetspeak)

onslow by Rick Conant April 13, 2006