A person who rats another person out to a higher authority without a good reason to make themselves feel superior or to make themselves out to be a more "morally aware"
The Crew: Fuck yea, we all got straight A's! Lets get drunk and celebrate!
Brandon: I cant believe you guys did that, by the way I told my dad, he's a cop.
The Crew: What a fag, he fucking snitched on us