to anticipate or experience the loss of something. If you leave your camera on a park bench, you can kiss it good-bye.You kissed your wallet good-bye when you left it in the store.
Be forced to regard as lost, ruined, or hopeless, as in Now that both kids are sick, we'll have to kiss our vacation in Florida good-bye. This usage ironically alludes to a genuine good-bye kiss. [Colloquial; c. 1900] Also see kiss off, def. 2.