Meaning:
The short form of “good game,” this term is often used by gamers to complement a competitor and concede defeat towards the end of a game. Originally used in South Korea, the word has been introduced into China and then spread to non-gamers. Chinese netizens now use it to mean “failure” in a more general sense.
Example:
A: 如果这次考试成绩特别好,你爸爸答应给你什么奖励?
Rúguǒ zhècì kǎoshì chéngjì tèbié hǎo,nǐ bàba dāyìng gěi nǐ shénme jiǎnglì?
What did your dad promise you if you did exceptionally well on the exam?
B: 他答应给我买一只小狗当宠物。不过没戏了,这次考试肯定GG了。
Tā dāyìng gěi wǒ mǎi yīzhī xiǎogǒu dāng chǒngwù。 Búguò méixì le ,zhècì kǎoshì kěndìng GG le。
He promised to buy me a puppy for a pet. But there’s no way I can get the puppy now, for I’m pretty sure I’ve flunked it.