To stare at others in a perverted manner, especially whilst thinking sexual thoughts about them.(verb)
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Use "perv" in a sentence
"Oh sure Rep. Peter King calling MJ a perv is so much worse than the THIRD IN LINE TO THE PRESIDENCY OF THE UNITED STATES calling the CIA (as a whole) lairs."
"My whole diatribe against the kid being a perv is the fact that he cannot help himself when it comes to showing restraint in using MY computer to look up porn."
"So tell me again why extorting a perv is a crime? check you consequences of your actions, letterman."