a person who masturbates so much each day, it has become part of their nature and will continue to do it without even thinking about it.
Dude #1: dude, i heard Jimmy jacking off in the bathroom!
Dude #2: it shouldn't be a surprise, that guy is an ejaculatron.
Dude #2: it shouldn't be a surprise, that guy is an ejaculatron.
by awesome-o 4000 April 1, 2010
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