When your mind and body becomes so overwhelmed with such ecstatic joy while delivering the father of the groom speech that you yell out at the end "I'm having a mental ejaculation of joy" and then drop the mic.
To orgasm after the act of sex has been completed. The opposite of pre-mature ejaculation.
Jack failed to ejaculate during sex with Jill but successfully came afterward while eating a bowl of cereal in a phenomenon known as post matureejaculation.
A thought or realisation after ejaculation whereby you have, either, random or relevant thoughts due to your mindnow thinking clearly without sexual hormones being active.
After sex:
Girl: Hey baby, what you thinking about?
Guy: I was wondering why Woody and Buzz were named after dildos.
Recollection of sex:
Guy 1: Did you have Post Ejaculation Thoughts?
Guy 2: Yeah, I realised I didn't want to be with her.
A truly epic achievement which can be accomplished when masturbating to a familiar pornographic scene. The masturbater achieves synchronized ejaculation when he ejaculates at the same time as the man (or men) in the video. This cannot be accomplished with lesbian or all-girl porn.
Joe achieved synchronized ejaculation and then high-fived everyone he knew with the hand that wasn't covered in ejaculant.
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