hubble Share definition Flag 1.meaning to leave one girl for another of lowerness (ie/ looks, class, etc.) without realizing that they have taken a step down. 2.not understanding in sex and the city carries says to big : "Carrie: Your girl is lovely, Hubble. Mr. Big: I don't get it. Carrie: And you never did." hubble by Jennifer April 6, 2004 Get the hubble mug.