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Semtex Shit 

The act of taking a shit so hard that it sticks to the toilet bowl similar to the way semtex sticks to surfaces/people in the Call Of Duty series.

Sometimes it even has the ability to withstand the force of a flush or two.
Person 1: "Yo man, I just took one hell of a shit, it's stuck on like semtex and it won't flush away, what should I do?"

Person 2: "Oh you took a semtex shit? Its cool, just leave it for the cleaner, I'm sure she won't mind."

*Later that day....*

Cleaner: "WHYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY?!?!"
Related Words
A word describing the act of “microdosing” MDMA by dipping your finger into the powder, licking it and then flushing it down with large quantities of wine or beer. You should repeat this process 4-5 times in one evening. It was named in Prague, Czech Republic and its name Semtex is related to this origin (Semtex-An explosive from the Czech Republic)
Dude, Laura destroyed her phone when she was leaving the bar yesterday.
How? Was she drunk?
Nah worse, she did Semtex
Semtex by nobitches77 March 23, 2022
Shit that gose boom! A plastic based explosive
Holy shit the semtex blew up
semtex by Dfunk Williams November 2, 2004
-noun: a called upon member of your team that has been given the duty of "diving on a hand grenade."

i.e. a wingman that has to stick to the fat/ugly chick (like the sticky explosive from Modern Warfare 2) all night, while your boy is running game.
Justin, SEMTEX!

Ha, Pauly is on semtex duty tonight. He's got to stick on the fat chick.
Semtex by bolo1g2 January 24, 2010
Systex (adj) is a word for a nonbinary, polyamorous couple that experiences alterous attraction towards one another. That means, an attraction that is not entirely platonic, nor romantic.
Sam, Mystic, and Alex; one of the most cutest half couples, are in a systex relationship with each other.
Systex by rainy_lantern September 26, 2021
Syntex is a made up word thats combined with "syntax" and "helps". Theres multiple situations that you can use Syntex with.

Examples:
Guy: "Whats something that starts with an s, ends with an x, and has an e?"
You: "Syntex."
Syntex by notacupofmilk August 26, 2023