1 definition by wette van otterpocket

An abandoned beer in a party or bar setting, particularly one which remains after the evening's festivities are over and is consumed by someone of lesser standards and/or means.

Usage apparently limited to a small circle of friends in the UMass Amherst area, late '80's through early '90's.
I was so trashed last night I was going around drinking slopers, even ones with cigarette butts in them.
by wette van otterpocket September 18, 2015
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