Kourtney Kardashian -- You Attract More Flies With Honey ... and Boobs (PHOTO)

Kourtney Kardashian displayed an unusual amount of cleavage (for her) as she and the rest of the Kardashian clan went out for lunch after catching a show Sunday afternoon in Los Angeles.

Kourt is not one for such a revealing look, normally that's Kim ... but she was the conservative one for a change.