Top definition
the act of bringing cheap beer to a party and then drinking somebody elses beer and leaving yours for the host to drink later.
Clara: Hey George grab me a beer.
George: We're out of beer, all we have left is Darby's keystones.
George: looks like he keystoned us again.
by freak90 December 09, 2008
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2
To be high on Marijuana and drunk on Keystone Ice at the same time.
He was so keystoned he couldnt even walk.

After two bowls and 8 keystones, he was keystoned out of his mind.
by Drobnizzle February 21, 2008
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3
A band from Philadelphia, PA.
2008 - present
Influences: Rock, Blues, Jazz, Prog, Singer Songwriter, etc.
myspace.com/keystonedmusic for more information
Keystoned is a great band.

I got keystoned last night at the show!
by Watts2k May 02, 2010
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