Some Japanese Xbox game.
Gained popularity from the Youtube video "NINE is Terrifying" by Marsh, and the script of the video was turned into a copypasta within the Shin Megami Tensei community.
"Shin Megami Tensei NINE is a psychological horror game about a guy who gets attacked by a giant angry scrotum at a Taylor Swift concert, and then spends several months facing horrific hallucinations from the resulting PTSD."
Blowing all the air out of your lungs and tensing your abs as tightly as possible, to the point that you can barely speak. This is generally done at pool parties or the beach, in order to look like your waist is smaller and your body fat is lower than it actually is. This is particularly used by shirtless people when a photo is being taken of them or when their crush is nearby.
Greg: Dude do you want a beer Terry (in a quiet, strained voice): Dude I can't talk, Jenny is over there so I'm pulling a tactical ab tense.
The guy gets a blowjob from the girl, then jizzs over her head/hair... She looks up in surprise and he decorates her with Tinsel, the jizz holding everything in place.
A super-powerful move used by the Akatsuki member Pein (Nagato) that allows one to create a powerful blast that will push away anything. Pein uses it to completely destroy the leaf village, in addition to using it while fighting Kakashi, Choji, Jiraiya, Sage-Mode Naruto, and Kyuubi Naruto.
It can also be used in an everyday context to refer to someone getting completely destroyed.
Version 1: Pein used Shinra Tensei and completely fucked up the Leaf Village in Naruto.
Version 2: If you don't pay me back, I willgo Shinra Tensei on your ass.