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1.
(Spinoff of "cock block".) A hop block occurs when one person impedes another person's attempt to drink beer. Usually a spouse/significant other, but could be any friend, co-worker, or a complete stranger.
I had the bartender's attention for a moment, but the hot blonde at the other end of the bar keeps hop-blocking me.

I can't meet you to watch the game today. My wife pulled a major hop block by scheduling a hairdresser appointment, and I have to watch the kids.
by Mike E Me July 15, 2010