1. To ruin or undermine
2. Something so horrible, it can only be compared to 9/11
1. "MOM! You 9/11ed my sandwich!"
2. "Bongo keeps on pissing on the kids. He's totally the 9/11 of party clowns."
3. "I was having a great day, until Brandon started 9/11ing it."
by TheNoogie April 17, 2014
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When 20 Arab extremists explode in your bush.
Man last night was crazy, started at Brielle’s birthday party and ended up 9/11ing #missionaccomplished
by John Stamos420 February 15, 2019
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When one guy has his penis erect straight up and another guy flies his dick like an airplane into the other guys dick.
Guy: We totally 9/11ed last night.
~~~
Guy: We should try 9/11ing.
by TrentonPottruff November 23, 2016
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When two guy stick their dicks straight up and another guy runs into them with his penis
What are you gonna do to us step bro?

I’m 9/11ing you.
by DJVenus February 13, 2021
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