ETYM Italian ribuffo, akin to ribuffare to repulse; pref. ri- (Latin re-) + buffo puff. Related to Buff to strike, Buffet a blow.
1. A deliberate discourteous act (usually as an expression of anger or disapproval); SYN. slight.
2. An instance of driving away or warding off; SYN. snub, repulse.

To reject outright and bluntly; SYN. snub, brush off, repel.