E-mail Cannon

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.