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1.
Getting high off pot
Man, you shouldda seen him, he was so dubbed up, he fell over twice before he got outta my house
 
2.
An automobile that has 22 inch rims(blades)on the tires.

Dub Dub's means 22's or 22 inch rims.
My homeboys ride is dubbed up.

His whip has dubs on it.

Real Playas roll 24's ..Dubs are for ya'll assistant pimps in training!
by Fromdadirtysouth September 06, 2003