蹲坑蹲到腿抽筋
[dūn kēng dūn dào tuĭ chōu jīn]
Translates to 'Squatting so long that the legs cramp up.' This phrase suggests a funny, exaggerated complaint about discomfort or an awkward situation where one had to endure prolonged squatting, possibly in reference to waiting or a toilet without a seat.