Meaning of hubba hubba

hub•ba hub•ba

Pronunciation: (hub'u hub'u), [key]
— Slang. Slang.
  1. (an exclamation of admiration, approval, or enthusiasm, used esp. by G.I.'s of World War II as a shout in appreciation of a pretty girl.)
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.