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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
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.
"Hey bro you tryna go on a chud run with me??"
chud run by chad brandson July 24, 2026
Word of the Day on July 28, 2026

flophouse 

Any house/apartment/frat house/trailer/etc. which is used for individuals to crash (sleep, chill, hang out, lurk, etc.) for a period of time. In order to "crash", one must not actually live there (e.g. have their name on the lease, own said flophouse, etc.). Flophouses are typically used by college students, drug addicts, transients, vagrants, or other unsavory characters.

A flophouse may also be the home owned by the parents of a college student, who after being away at college, wishes to live as if he/she is still at college (e.g. staying out all night, returning just to crash at mom and dad's house, then leaving again), rather than conforming to the pre-college rules.
Example #1
Dude: (Talking to someone passed out face first on the floor of his college apartment) Hey man, who the hell are you? What do you think this is, a flophouse??

Bro: Sorry dude, I must have passed out for a minute.

Example #2
Mom: Where have you BEEN for the last three days? You come home just to sleep?? What do you think this is, a flophouse??!!

Son: What's your problem? I'm an adult now!
flophouse by J3553 November 21, 2007
Word of the Day on July 27, 2026