Pew is an onomatopœia that describes the sound that space guns make in the movie Star Wars. Often used by young pre-school aged boys, Pew can either be a verb or a noun.
Verb Form; I will pew you. Past tesnse form: Pewed
Pew the sound a person makes with their hand when using it as a fake LASER gun. Nothing of relation to photography, this is not the sound a camera makes.