Top Definition
The case in which a small duck happens to float in your bathtub. Depending on whether or not this said duck is made of rubber or flesh and duck organs and etc., there is no threat of danger.
GeneralPerson #1: "Did I tell you? There was an Ub Dub this morning!"
GeneralPerson #2: "Same thing happened yesterday!"
by UbDubMaster January 03, 2010
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