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
by nobitches77 March 23, 2022
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-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.
by bolo1g2 January 24, 2010
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After sex, removing a condom full of JIZZ and tying a knot in it. It is then thrown at your partner while yelling "SEMTEX OUT." Hopefully it will stick to your partner for the full effect.
After Sex...
Her: OMG, That was amazing.
Him: *Throws condom at her* Semtex out!!
Her: *Sticks to forehead.
by Ham Lincoln September 23, 2019
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Shit that gose boom! A plastic based explosive
Holy shit the semtex blew up
by Dfunk Williams November 3, 2004
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Definition:
A bitch that sticks to you and never leaves you alone.
Example:
This girl is a straight semtex she text me everyday!
by Hebbs and Pflanz August 11, 2010
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the name given to some one who has a really bad temper and who loses their cool quite a lot. mostly verval towards others or things but at times can be violent
while using the rfid machine it stops working. so semtex starts shouting at it, headbutting it then runs it over with a barra.
Walks about all night giving people abuse randomly.
On a bad night no 1 is safe.
under no circumstances ask to speak to his brother
by weelianne August 6, 2007
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Cool individual from the Liverpool area who can go off like a box of fireworks when called upon
1.In a bar with a rowdy manc, leaps to his feet and kicks the mancs stones out and saves the day for every one in the pub
by Kidz August 22, 2003
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