Top definition
n.

An inexpensive brand of alcohol used to sustain a state of inebriation, usually past the point of being able to discern between a good beer and an expensive beer.
Jeff started off his night at the pub with a Guiness and a few Sam Adams. Towards the end of the evening, he was throwing back sustainer beers like Coors Light/Natural Ice/Keystone to sustain his drunkenness.
by ukilledthecat October 09, 2009
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