1)To reject a statement/idea/proposal from a
wasteman and to encourage said fool to look at himself and
man the fuck up.
2) To cast a downing judgement on
a fool's actions.
Example:
1a)
Wasteman: This party sounds hectic but I say we go to my nans, she cooks up a mean steak casserole.
Safeman: *kiss gums* Blud you trippin,
disallow yourself.
1b)
Wasteman: Aight, Halle Berry would get it, but if you catch Rosie Odonnell from the right angle, I swear to ja I would happily poke her.
Safeman: Be easy nigga! step down. Think 'bout wha chu sayin' foo'. Dat bitch is
stacked out.
Disallow yourself.
2)
Wasteman: *Gets his ankles broken in basketball match*
Safeman: 'memba I told chu, tell your friends and disallow yourself.