To become high by way of snorting or sniffing cat piss. Cheesing can cause a psychedelic trip where the person cheesing visits a fantasyland where they get to fornicate with the boob princess. Trey Parker and Matt Stone discovered the miracle effects of cheesing.
To describe one who is high on cat urine.
Cheesing was the topic of episode 3 from season 12 of South Park titled "Major Boobage"
-I am cheesed out of my mind
-I will grab my pussy then we can go get cheesed.
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
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.
"He's cheesing his F-ing balls off, dude."