表情裂崩
[biăo qíng liè bēng]
The term '表情裂崩' refers to an internet slang expression. '表情'(biǎoqíng) means facial expression and '裂崩'(liè bēng) implies breaking down or cracking up. Altogether it can be used when one's usual mask-like composure shatters due to extreme emotion or uncontrollable laughter, often implying that someone couldn't hide their feelings anymore.