Top Definition
To leave a small amount of beer (quarter sip at most) at the bottom of a bottle.

The bottom quarter sip of beer is mostly backspit and watered down, flat beer.....the least enjoyable sip of your beer. Zep the Beer and get a new one!
Why doesn't he just finish his beer, instead of Zepping the Beer?
by Juliusaeneas November 07, 2011

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