Other forms: pervs
Perv is clipped slang for a man whose sexual conduct is thought creepy. Called him a perv, a total perv, stop perving.
It is an accusation rather than a description, and it covers anything from staring to serious wrongdoing, which is part of why it is a poor word for a serious matter. The verb, to perv at somebody, means to stare in a way that makes them uncomfortable.
1nounpervA man whose sexual conduct is thought creepy or unacceptable.
“Some perv kept sending her creepy messages online, so she blocked him.”
perv is an insult.
A clipping of pervert, from Latin pervertere, to turn about, from per plus vertere, to turn.
a clipping of pervert.
Etymology from Wiktionary, CC BY-SA