Referring to a weapon using 9mm ammunition.
“Hey wanna go shoot the 9 later?”
by Mmmmmmph July 30, 2021
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The 9/11 is a sexual technique performed by 2 men and a woman. The men have to lie down with their penises relatively close to one another so they resemble two towers. Then the woman has to "slam" the towers by inserting them in the vagina and anus or mouth one after the other.
Dude, the 9/11 we pulled last night was so dope. No homo though
by Volteh August 19, 2017
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When you fancy your postman so much you just want to rip his socks and pants off and allow him to enter in to your humble abode from the backdoor.

Merty Bernister
Oh that postman is so hot I wish he would just do the 9 Brachdy Road Cardiff up my anus.
Merty bernister ached for his local delivery boy to deliver the 9 Brachdy Road Cardiff up his sausage swollow
by Merty_bernister_9brachdyroad September 16, 2019
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Where a man sticks a 9 volt taser in his ass and shocks himself for sexual pleasure.
He used the 9 volt technique.
by ISTRUGLLETOGETTHELADIES March 07, 2016
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