假装很陌生因为太熟悉
[jiă zhuāng hĕn mò shēng yīn wéi tài shú xī]
Translating as 'Pretend Stranger Due to Being Too Familiar', this suggests trying to distance oneself from a situation or person despite already knowing them very well. Could be used after an argument or during awkward encounters when one wants to maintain social boundaries.