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1.
A person who heavily smokes marijuana/cannibis/pot/weed.

Also see stoner, pothead.
Go away you f**king zerb!

That guy Dave is a such a zerb.
by qmas October 20, 2003
 
2.
A guy who thinks he's hot shit, dresses flamboyantly and flirts with all the girls but to everyone else he is a metrosexual hipster and is on the. verge of homosexuality
"Dude that guy hitting on those girls is such a zerb."
"Yea I know he deffinetly tried sleep with me at the party last weekend"
by real squeal November 14, 2013