Verb. To feff is to touch someone else in a way or manner that makes them feel uncomfortable, whether it be through sexual inappropriateness or violation of personal space.
Don't leave your girlfriend with mr. X over there, he'll feff her
by LordBNG February 14, 2009
2 more definitions
A front-end fart. A synonym for 'queef'. See also 'pussy fart'
Her Kiegel muscles were so well-developed, she could feff at will and literally make her pussy talk.
by Harry Hungwell April 12, 2009