Top Definition
A Polynesian/Pacific Islander who hides behind a fence in South Auckland, and then "pops up" without warning to throw a large rock onto the road. These creatures often work in packs and one should drive quickly through such areas to minimise a "pop-up" attack.
"Mate, I'm heading down to Otara today to pick up some weed."
"Oh, be careful for Pop-up boongas mate, they might throw rocks at you"
by HOB October 11, 2004

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