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!"
D.u.b.s meaning: "dick under belt system". also refered to as simply "dubs", is a erection concelment and supression method used mostly by highschool students. Also you can earn extra points if the head of your penis can be seen above suppression line when your arms are raised
*note* belt can be substituted for the elastic lining of underpants.
Damn, that bitch i sit behind in math is so hot. i had to sport tha dubs to hide my woody.