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M-99 (or M99) is the shortened term for the tranquilizer known as Etorphine Hydrochloride. It is used commonly as an animal tranquilizer and is known to be 1000 times stronger than morphine. This drug is commonly used in the Showtime series Dexter.
Dexter Morgan: What am I even looking for?

Vince Masuka: Wait for it.

Dexter Morgan: This is a prelim. I don't have time to...

Vince Masuka: M-Fucking-99 (M-99)

Dexter Morgan: Etorphine Hydrochloride?

Vince Masuka: An animal tranquilizer more powerful than morphine. Causes total paralysis. That mark on her neck kept bugging me, so I ordered up a tox screen.

Dexter Morgan: (voice over) That's it. No more doughnuts for Masuka.
M-99 by Teeny the Aweshomest February 4, 2009
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I’m better than 99.9% of all the other UrbanDictionary users out there

I’m better than 99.9% of all the other UrbanDictionary users out there.

I’m better than 99.9% of all the other people out there 

There is no hiding it. I’m just better than all you
I’m better than 99.9% of all the other people out there.

I’m better than 99.9% of all other UrbanDictionary users out there. 

Yup. Bow down and suck it, b!tch
I’m better than 99.9% of all other UrbanDictionary users out there.

I’m better than 99.9% of all the other users out there 

True. Turn green with envy and bow down. RIGHT NOWWWWWWWWW
I’m better than 99.9% of all the other users out there

Stealthie 

when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.

This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"

FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"
Stealthie by gwenhyfar October 2, 2016
Word of the Day on May 25, 2026

Summer Teeth 

When someone has a lot of missing teeth.
Mannn, that dude has summer teeth!
What do you mean?
Summer here, summer there...
Summer Teeth by BeckPot August 2, 2012
Word of the Day on May 24, 2026