look up any word, like timebomb:
 
1.
Lifespan, derived from an often-cited average of years. Sometimes used in irony by soldiers or other individuals who do not expect to die of natural causes.
"Before I've had my eighty I'll own a red mustang"

"At the end of my eighty I'll return to the dirt"
by Volac March 25, 2010
 
2.
A type of Scottish beer, strong and quite sweet and fizzy. Some say it tastes like lemonade. Named from the fact that the duty on a barrel of the beer used to be 80 shillings (i.e. 4 pounds). Generally about 4.2% to 4.5% alcohol by volume.
Two pints of eighty and a whisky chaser, mate.
by refusal March 12, 2004
 
3.
The contact of a ballsack with a chin or ass, also known as "balls deep." Derived from the following picture... 8======>0 8===0 80 ...as you can see, the wang is in full "80" position in the final in the 3rd stage.
Tanshizzle- Damn dawg that biatch you had up in yo' room last night was a moanin hoe. Brah, I couldnt even sleep!

Erntar- Yeh bro thats cuz I was goin eighty on that sloppy lil' coochie.
by Erntar February 22, 2004
 
4.
Refers to cocaine. Another term for cocaine.
Jim is going eighties this weekend.
by JMO342 July 06, 2005