A Navidi is a person who engages in random activities, including yet not limited to: headbutting people; pretending books are firearms; shouting out random comments at any time of the day; impersonating the GMA teacher; and getting a haircut like Aristos. A Navidi may also be confused with a Russo.
"That Navidi shot me dead with his Economics book today"
"Don't be such a Navidi headbutting that poor boy"
"What? Shutup you bastard guy" "Omg you Navidi"
"Hey, its Aristos from the surprise chef! Oh wait, its only a Navidi"