Kiss of death.

About Kiss of death

The kiss of death is the sign given by a mafioso boss or caporegime that signifies that a member of the crime family has been marked for death, usually as a result of some perceived betrayal. It is unclear how much is based on fact and how much on the imagination of authors, but it remains a cultural meme and appears in literature and films. Illustrative is the scene in the film The Valachi Papers when Vito Genovese gives the kiss of death to Joe Valachi to inform him that his betrayal of "the family" is known, and that he will be executed.