|2.||Off On One|
Behaviour outside the realms of normal, with respect to the individual.
To do one's own thing.
To 'give the birdie' to the world and make a concerted effort to annoy / piss off / offend as many people as possible in a given timeframe.
John: Er... is Calvin off on one?
James: Nope - he usually chases pigeons on his lunchbreak.
James: Woah - does Miranda usually dance on tables whilst inebriated, sans underwear??
John: Nope - she's off on one.
|1.||Off on one|
To behave in an extreme, inappropriate manner in response to provocation.
When he heard he just went 'off on one' and wouldnt stop ranting for several hours.