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1. The uncomfortable feeling one gets in their lungs after smoking too many cigarettes.

2. A pejorative term for smokers.
1. "Man, I smoked a whole pack yesterday. I've got the buttlung bad today!"

2. "Going out for another smoke, buttlung?"
Buttlung by I Hate Josh Shephard August 31, 2015

Buttlong 

A long annoying amount of time. See Asslong.
I hate waiting in the buttlong line at the taco place when I'm starving yo!
Buttlong by ,_\ ( ) |-| /\/ March 14, 2009

Butthunger 

(butt-hunger)- n - An urge, craving, or hunger for an object of sufficient girth and mass to be consumed/swallowed by one's anus.
It had been hours since Mike and Sean had seen each other and both were suffering from a horrific cases of man-lust and butthunger.
Butthunger by Kilo Jonez March 25, 2009

buttfungus 

A slang term for "Chronic Anal Candidiasis", or in infection caused by a fungi growth on the anal pore. Not unlike a yeast infection, the symptoms include severe itching/burning and a smelly fuckin' white discharge.
"Dude, I can smell your buttfungus...you should have that looked at."
buttfungus by Colonel Turdburglar August 14, 2005

Terminal Buttfungus 

Terminal Buttfungus is a dreadful, vicious fungal disease that affects 2 out of 3 women who are not buttfucked at least once a week.
You have to assfuck your woman, or she stands a 66% chance of catching terminal buttfungus and will die as slime molds devour her asshole.

buttlingus

Oral stimulation of the anus.
As cunninglingus is to the vagina, buttlingus is to the anus.
buttlingus by Brien May 23, 2006