Using the "direct share" capability in the social media tool Stumbleupon to repeatedly send the same URL to a friend of yours. The result is "blitzing" their queue of sites, so that the same page (e.g. Rick Astley) shows up again and again.

Coordinated attacks by multiple friends against a single friend is another variant.
We all got together and stumblitzed a really bad Hannah Montana song to Kevin the other day. It probably took him 20 minutes to dig out of it.
by HMS Gaylord December 9, 2010
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