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...
(INSIDE JIMMY'S BRAIN)
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)
(SCENE LEAVES JIMMY'S BRAIN)
Jimmy: BRAIN BLAST!
by DanMat6288 December 17, 2004
Get the brain blast mug.
Stuffing the entire ball sack into the ass or vagina of another.
Me and my girl friend were brain blasting all night. My balls still smell like ass.
by theonetrueruler November 30, 2013
Get the brain blasting mug.
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
Get the Brain Blast mug.
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 August 11, 2015
Get the Brain Blast mug.
Cumming in someone's ear so far it touches their brain.
I brain blasted and she died...
by Brain Blast June 4, 2017
Get the Brain Blast mug.
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."
by Club Penguin Tech Support October 8, 2017
Get the Brain Blast mug.
The act of filling a girl/guys asshole with cocaine and/or ketamine, and then waiting for him/her to fart, thus blasting it into the nasal cavity at high velocity.
That party was so crazy, Kelly was letting everyone do brain blasts all night.
by Charles chamberlain October 6, 2020
Get the Brain Blast mug.