To appear as though you might molesty someone.
Someone who is molesty may, or may not, have a molestache
"Man that guy is super molesty; he's been watching those kids play on those swings for like 20 minutes!" OR
"Check out that molesty guy in the white van!"
The type of mustache that someone who is molesty
The mustache of a molester.
The bigger and dirtier the molestache, the more molesty the molester will be.
"Check out that guy's molestache...he's so molesty!"
"Man...don't go around that guy, his molestache is a dead give away of future molestation."