Kiss and tell recount one's sexual exploits, especially to the media regarding a famous person; in US politics from the mid 1970s, the revealing of confidential information gained through any close or privileged relationship.
the kiss of death a seemingly kind or well-intentioned action, look, or association, which brings disastrous consequences; the association is with the kiss of betrayal given to Jesus by Judas.
kiss of peace a ceremonial kiss as part of a religious ceremony, especially in the Eucharist.
kiss the gunner's daughter be lashed to the breech of a gun for flogging, an old naval punishment.
See also an apple pie without some cheese is like a kiss without a squeeze, Judas kiss.