Learn English – Someone who “despite the disgrace, still refuses to admit mistake and instead portrays the event as a victory”

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What is the English idiom, expression, or proverb to express that even if I am proved wrong by all the members in the room, still I flaunt a false pride as if nothing happened?

In Hindi, there is a saying, "Gire to gire phir bhi tang upar!" which literally means "Even if you fell, still you act [to naive people] as if you have won." The meaning is that a snob always acts as though he has won the debate, game, or election when everyone else around him knows within himself that he has lost it.

Example:

Jim and John are coworkers working for the same boss. John the snob has returned from the boss's office bringing along his termination letter for blatant incompetency, screwing up on a project, tardiness, and having a negative effect on other staff members' morale. While behind closed doors John grovelled to his boss, begging to give him another chance. Once outside he brags to Jim. Here is that conversation:

Jim: How was your trip to the boss's office?

John: Oh! the boss. I back answered him and came out. I don't care.

So here the expression means "Even after John's setback, still he portrays himself (primarily to convince naive, unaware bystanders) as unbothered or unfazed by the whole episode and implies that, on the contrary, he went into boss's cabin and gave him a piece of his mind and then came out.

Best Answer

Parts of your question make me think "in denial" is what you're looking for. This isn't a strong tie-in, but it works. This is the case where the person genuinely believes they are right/correct/has won, but isn't.

"Even if you fell, still you act in denial as if you have won."

Another part of your question is the idiom "talk out of both sides of (your) mouth". This case is usually when a person is doing it on purpose. https://idioms.thefreedictionary.com/talk+out+of+both+sides+of+mouth

To try to maintain contradictory positions or beliefs in an attempt to please the most people. "We all know that you've been talking out of both sides of your mouth about the merger, so please, just tell us the truth.Will there be layoffs or not?"
"I don't trust that candidate—he still hasn't committed to a clear course of action and is always talking out of both sides of his mouth."

The above examples are mostly "cover your {rear}" (CYA) statements, but this can be done in a malicious way, to make someone seem better than they are, to cover up a blunder, or just to be rude.

This would be akin to lying, where you tell one person or group of people one thing, then tell another person or group something completely different. This is the case of John begging the boss for his job, then telling Jim that other story.