تعریف و معنای "kiss one's ass goodbye"

What is the origin of the idiom "kiss one's ass goodbye" and when to use it?

The idiom "kiss one's ass goodbye" is often used in a humorous or sarcastic context to state that one believes one is about to get into huge trouble or just die. It has no well-documented origin and is considered a modern and informal expression. The phrase humorously implies that someone is leaving a situation, sometimes with a dramatic or final gesture. It is not considered a polite or formal phrase and is often used for comedic or ironic effect.