Top Definition
Obnoxious internet adds which will pop up in new windows when a site with them is visited.
I hate pop-up adds!
by Isaac Brown December 11, 2003
A real shitty way to advertize products on the interenet. As your on the net, it comes out of nowhere and can freeze your computer.
Why don't these people who make pop-up adds realize that people hate their adds so much, they buy blockers to stop them from coming?
by lunar shadows December 27, 2004
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