Example 1:

When you are responding to a text message (or e-mail) and you get side-tracked or think of something else, and you click send prematurely.

Example 2:

You're typing / texting and you accidentally hit send

Usually doesn't make sense
Sometimes can have negative effects
person 1: So what are you up to this evening?
person 2: I'm go

*Person 2 demonstrates clear example of premature sending*
by Bozzzy May 22, 2009
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When you send an email before you're ready to send.

You might hit send accidentally or your cat walks on the keyboard and sends it for you or the next thing you know, the email has been sent even though you haven't even touched the keyboard.

The prematurely send-jaculated mail definitely isn't ready to be sent as it might be halfway written, have a lot of typos, or be too rant-y or stupid to be sent, hence causing embarrassment when the email reaches the recipient.
Co-worker to another: I just hit the wrong key and sent half an email to the boss that I shouldn't have!

Another: Premature send-jaculation is dangerous, hope you don't lose your job dude
by sarasplayroom.com July 14, 2009
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