Not John Vallone's definitions
An evil supernatural force that lives within cyberspace and randomly rejects sent emails for no apparent reason.
Dave: Did you email that hottie from Craigslist about hooking up this weekend?
Ryan: I tried but the mailer-demon apparently is already dating her...because he sent it right back to me.
Ryan: I tried but the mailer-demon apparently is already dating her...because he sent it right back to me.
by Not John Vallone November 6, 2010
Get the mailer-demon mug.Ken: Did Mr. Grumblecakes ever look up that girl on Facebook?
Mike: Yeah. He checked for meuches and apparently only had one. So now the idiot is developing a new strategy.
Mike: Yeah. He checked for meuches and apparently only had one. So now the idiot is developing a new strategy.
by Not John Vallone July 4, 2011
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