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).
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British Dictionary definitions for kiss off
(tr, adverb) to ignore or dismiss rudely and abruptly
a rude and abrupt dismissal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Other Idioms and Phrases with kiss-off
Dismiss or reject, as in He kissed off their offer. This usage alludes to kissing something goodbye [Slang; c. 1900]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.