Ministry of Education 《Revised Mandarin Chinese Dictionary》

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Word	屁股沉
Bopomofo	`ㄆㄧ^ˋ` `˙ㄍㄨ` `ㄔㄣ^ˊ`
Hanyu pinyin	pì gu chén
Interpretation	久坐不走。如：「有的人屁股沉，到人家家裡一坐，就忘了該告辭。」