Short for dictionary block, or urban dictionary block. The act of originating an urbandictionary entry before the true author can submit the word, thus stealing credit.

Dict-blocked also plays on the common phrase cock block with "dict" being phonetically close to dick, a synonym for cock.
Andrew proudly invented beeroner while at the bar. Covertly, Patty dict-blocked Andrew by entering said word into Urbandicitonary.com from her blackberry.
by Double A-Ron September 12, 2007
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