Slang. an act or instance of dismissing a person or thing: The company is about to give you the kiss-off, so you'd better start looking for another job.
Billiards, Pool. kiss(def 12).
Origin of kiss-off
First recorded in 1930–35; noun use of verb phrase kiss off
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019