diminutive of the verb vootar - to depart, to split, to leave; as a silent or clandestine way of communicating the desire to leave/"split"/depart a place
signified by extending the second and third fingers of one hand and curling the first and fourth finger under the thumb with one's palm facing inward, so as to spell out "V O O T" with the fingers - if you look, first at the 2 extended fingers (V) the two curled under fingers from the side (O & O) and the index finger touching the thumb (T)
You are at a party. It's lame. You flash the "voot" sign to your friends; they agree and you're outta there.