Mateo El Feo's definitions
when a girl farts when your in a car, house.....ect. and all you smell is a funk in the air and the source is unknown.....but guess what thats your girl ninjaing one out
i was laying in bed one night and all i smelt was a strange odor i looked over at niki and asked about her undercover fart....she laughed and admitted to it
by Mateo El Feo January 11, 2009
Get the undercover fartmug.