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The act of sending numerous e-mails or posts in a short period of time.
Example 1
Anthony: That's the 8th e-mail from Tom this morning!!!
John: Yeah!! He's aiming the ol' e-mail cannon at you bro!!

Example 2
Stephen: You want to troll the Rick Astley message boards?
Matt: Yeah, hold on!! Let me set my e-mail cannon to stun.
by Mr. WAT April 30, 2008
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