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18.
The act of snorting or injecting a herion based recreational drug made with certain over-the-counter cold medication, such as Tylenol PM. Such cold medications contain acetaminophen, the active ingredient in Tylenol, and the antihistamine diphenhydramine, the active ingredient in Benadryl2 and a common opiate potentiator.
Cheese samples obtained in north Dallas contained between 2% and 8% heroin, in contrast to the 30% commonly found in black tar heroin. This drug originated from Dallas/Fort Worth, Texas.
I'm cheesing my fing brains out!

Let's go cheese!

You want to cheese man?

Do you know where I could score some cheese?
by Jonathan62 May 02, 2008
 
1.
Huffing Cat Urine. It is called Cheesing because it is Fon to Due.

It causes a euphoric state where the user hallucinates. Such hallucinations include, but are not limited to, flying through space, driving rocket cars, meeting women with rokin' tits, flying on squirrel dragons, saving said big breasted woman etc. Usually 80s heavy metal power rock is playing in the background.
You also get to fight in the Breasturary, and swim in the fountains of Varnuf with the Itty-titty fairies of Mammary Mountain, as well as fight the boob-goblin in the Gozonga Cave.

20% of students between the ages of 6 - 12 have said they have tried it at least once.

Other slang terms for cheesing:
The Cheese Game
Vitamin Cheese
Mary Jane Piss in yo face fun time.

How to tell if your child is Cheesing:
1.) Your child seems distant, preoccupied.
2.) Your child's face smells like cat urine.
3.) When you see tigers at the zoo, your child starts grinding his or her teeth.
"Dude, I'm cheesing my F-ing brains out right now"
"He's cheesing his F-ing balls off, dude."
by Double07nr March 26, 2008
 
2.
adj. Used to describe a person with an uncontrolable grin usually caused by a mischievious act of their own doing or as a result of drug use.
If you aren't stoned, why are you cheesing?
by poo eater May 03, 2003
 
3.
A word that went from 2 definitions to 37 definitions on UD in just one day. Thanks to Trey and Matt.
South park aired an episode where Kenny got high off of cat pee and they called it cheesing. Now every South Park/Urban Dictionary freak like me has to add his/her/it's definition.
by Jerry Lambert March 27, 2008
 
4.
Verb. To smile real big, like the Cheshire Cat. Probably from photography" "Say cheese!"

Look at him over there! Got his little award and just cheesing!
by Besito April 30, 2009
 
5.
(verb): doing something cheesy, playing unfairly- against someone (does not apply to obtaining special cheat codes for 1 player computer games).
stop cheesing me, you noob
by Sexydimma June 18, 2013
 
6.
The grin you get when your high.
man he's cheesing look at that grin on his face.
by thatsrightson April 29, 2009
 
7.
getting high off of cat piss

-originated from south park
"Kenny stop cheesing!"
by mattyou1234 March 28, 2008