Definitions by Lawren J. Reicher

Neville up 

To become ridiculously more attractive than one's former self, primarily, but not exclusively, as a result of puberty. A pun on 'level up', referencing the unexpected transformation of Neville Longbottom (Matthew Lewis).

"Did you see what that kid from ET looks like now?"

"Yeah bro, I didn't expect him to Neville up like that."

Neville up by Lawren J. Reicher December 1, 2013