Top Definition
1. n, A "Discordian" Project / activity involving putting posters and stickers up all over the place. Meme bombs, surreal phrases or images, and Operation: Mindfuck pages are preferable.

2. v, an expression of joy relating to postergasm.
When I realized I wasn't the only one in my neighborhood putting up posters, I had a POSTERGASM.
by Cramulus June 04, 2008

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