whack-a-mole
The "game" one has to play to quickly close the interstitial ads and other windows that pop-up on some commercial Web pages (especially porn sites). These pages will sometimes generate new windows every time you close a previous one, creating a situation similar to the action in the popular arcade game "Whack-a-Mole."
See also : hook and book
NetLingo Classification: Online Jargon
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