Wellkiller 

A scrawny ass Chinese fag who is bullied, so he will snap at any moment and kill his whole school like Columbine. Either plays no sport at all or tennis. Usually is gay.

That kid in the corner fapping to hentai is a total wellkiller.
Don't fuck with that wellkiller or he will bomb the school.

Wellkiller by JewliasFgt May 12, 2014

WeedKiller 

A person that looks so revolting that you get a reverse boner

Katie is a major WeedKiller. My dick almost fell off because it was so bad.

WeedKiller by Grand Master Abdul January 9, 2016