(verb) The accidental erruption of premature birthday greetings, posted via electronic means; at least one week in advance.
After publicly posting several genuinely heart-felt electronic birthday greetings on the considerably incorrect day, appropriate follow up commentary:
"Ehh... well, evidently the world now knows I suffer from premature eBirthdayjaculation..."
"Ehh... well, evidently the world now knows I suffer from premature eBirthdayjaculation..."
by sphinxx July 24, 2013

When one freaks out on somoene too early. Usually about something stupid. Most of the time they don't have all the facts and jump to conclusions, assuming the worst.
by Mc May May July 24, 2009

When someone sents you an unfinished text message, usually a fragmented sentence, which leaves you confused.
by Tre Florez July 3, 2008

by JC63 December 9, 2010

partythrower: hey guys! you found my house.
guy: yeah, but janine was following us!!
partythrower: Damn!! lets prematurely evacuate into the backyard and shut off the lights.
guy: yeah, but janine was following us!!
partythrower: Damn!! lets prematurely evacuate into the backyard and shut off the lights.
by justcallmeroo August 1, 2009

by comaboy1971 January 2, 2012

Hypothetically blowing your load over a movie before you can objectively think about it and your response is not reactionary.
He totally premature cinejaculated over Transformers when it first out, two weeks later he realized how much it blows.
by Point Zero February 15, 2008
