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1.
Keystone beer is a product of the Coors Brewing Company in Golden, Colorado. It was first introduced in Chico, California in September of 1989. Due to its relatively low price, it is popular among college-aged individuals. Keystone can be found in can, keg, and occasionally bottled form.
Am I drinking a can of piss? Oh, it's just Keystone Light.
by macpj March 27, 2008
 
2.
The world's most powerful laxative.
"Dude, I drank a 12 pack of Keystone Light this weekend and had the shits for 3 days."

"Who needs Exlax when you can just drink Keystone Light? Plus it is cheaper."
by cones90 September 27, 2009
 
3.
the worst fucken beer on the planet composed of cat urine and elephant shit
if u bring keystone light to my party im shoving it in ur moms twat.
by absdude July 10, 2008
 
4.
water mixed with fermented pisss!!
dude I had 10 keystone lights and im only half buzzed
by captain.trips November 04, 2010
 
5.
Keystone Light is always smooth. It was voted the best Light beer in Point Pleasant NJ 05, 06, 07 and is the front runner for 08. Keystone Light is Coors light's younger brother. Keystone Light kicks ass.
Davis: This is the greatest beer ever. What is it?!?!?!

Bruce: Thats Keystone Light, the greatest light beer in the world.
by J-Mont April 01, 2008