Top definition
An individual who is assigned the task of drinking for other people because they are driving, pregnant, or have to get up early the next morning.
Guy 1: Wanna play some beer pong?
Guy 2: I wish, but I have to be at work at 8AM tomorrow.
Guy 1: It's fine, I'll be the designated imbiber.
by thebetterfriend2 June 19, 2013
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