(n) When the male scrotum is viewed upside down, resembling a brain of an extraterrestrial, or alien.
by Matthew Pablo September 3, 2006
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An alignment of the male genetalia such that the testicles are squeezed against the inside of the scotum, creating the veiny, lumpy appearance of an alien's brain.

May be performed with just the scrotum and testicles, or with the scrotum tucked over the penis and then pulled tight. Sometimes accompanied by shouts of "alien brains" or simply "blaaaah."

Generally used as a sign of disrespect or in an attempt to disgust (sim. moon). As with similar acts, the term "alien brains" can refer to both the act of presenting alien brains, or the rearranged genetalia themselves.
Knut was being a whiny little wuss, so I alien brainsed him.

or

Kristina looked sick, so I showed her some alien brains. She barfed everywhere.
by Cosmo March 22, 2004
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To take one of your testicles out and scare your friends with it by calling it an alien brain. The veins and shape represent that of an alien brain.
I was so drunk last night I must have alien brained at least 10 people!
by PinkyntheBrain October 25, 2011
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To be photographed whilst sleeping, sporting a set of somebody elses testicles upon your brow!
'Aaaaarrrrrrrrrrrarrrrrrrgh, I've been Alien Brained!!!' After receiving the Martian like picture through your door.
by Davey Cadaver November 23, 2007
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A cocktail intentionally made to look insane. Consists of half a shot glass full of peach schnapps, with Bailey’s Irish Cream poured on top. Once the shot is almost full, a small amount of blue curacao is added, and once that settles, a small splash of grenadine tops the drink off.
"Hey, what is that thing that looks like an atomic war on a different planet, and am I really expected to put this in my mouth?"

"Its an Alien Brain Hemorrhage. Enjoy, it's delightful."
by Elia K. January 30, 2012
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The practice of improving a microwave by creating a concoction in a large coffee jar of a few large turds; take a shit in the jar or scoop it in, the former is better than the latter as it doesn’t leave scoop marks. Then fill the jar with piss (you may need more than one person here unless you have a full bladder).

Put the lid on the jar and you have what looks like a preserved brain In formaldehyde.

Add to an enemy’s microwave, put on full power and walk away.

The resulting explosion will destroy the microwave and possibly the ceiling too.

Never buy a second hand microwave with burn marks on.
That landlord didn’t give me my deposit back so I popped an alien’s brain in the microwave and bid him a good day.
by Rigobert Song July 29, 2023
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