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a sudden burst of intuitive insight based on random memories; a quick, but bright idea for an immediate resolution to whatever problem the thinker is in. Jimmy Neutron is most known for having brain blasts.
(Crocker has taken over Fairy World)
Jimmy: They're really upset. Maybe these ARE more than just holograms. That means, if they disappear, they're gone for good. I can't let that happen! I've got to do something! But, what? Come on! Think... think... THINK...
Vision of Mr. Turner: Hey, Timmy, are you ready for the big science fair?
Vision of A.J. and clones: (laughing maniacally)
Vision of wand: (floats by)
by DanMat6288 December 17, 2004
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When a woman gives head and before you nut on her face you pull her head down on your dick so you bust up her nose into her brain.
jackie was so dumb while giving head so I thought i would bust in her nose and give her a brain blast.
by Deep3money25 March 11, 2018
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A brain blast is when you go in for brain surgery and while the doctor has your head cut open, ejaculates into your brain.
Also when you shove your penis so far up someone's nose and jizz, it touches their brain.
I went in to get brain surgery and when I woke up I realized I had a brain blast!

Anthony's girlfriend Tiffany wanted oral, but he instead gave her a brain blast!
by Fat Librarian September 16, 2015
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When you put your dick up a girls nose all the way to her brain, and then you nut on her brain aka a brain blast
Wayne says " hey, james your girl wanted it up the nose, so i gave her a brain blast last night"
by Weezy17 April 01, 2009
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1. Performing oral sex, or "face fucking" so roughly that when ejaculating semen spews out of both mouth, nose and (never has been confirmed) ears. First originating from Old English, and made more known when Jimmy Neutron coined the term.

2. Ejaculating in the mouth , but then continuing to have vaginal or anal sex. Where as to when finishing in the selected hole, the person getting "Brain Blasted" coughs up the semen left in the mouth the exact time you finish in the ass or vagina.
"Oh boy Sheen, I bet Cindy wants me to Brain Blast her"
Dad : "Catch the game son?"
Son : "No, I was brain blasting the dog."
via giphy
by Club Penguin Tech Support October 08, 2017
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When you cum in a girls nose and it hits her brain
Guy 1: So how did the sex go?
Guy 2: Good, I hit her with a brain blast
by Zyxety November 01, 2016
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To get your brain blasted by sound waves emiting from your headphones/ earphones.
Ugh! That scary pop-up gave me a brain blast!
by Dewott January 16, 2012
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