Meaning of pì gu:
屁股
buttocks; bottom; butt; back part
Xiǎohái shuāi dǎo le, ànzhe pìgu kū le qǐlái.
小孩摔倒了,按着屁股哭了起来。
The child fell and started crying while holding his buttocks.
Tā bù xiǎoxīn shuāi dǎo le, jiéguǒ shuāi dào le zìjǐ de pìgu.
他不小心摔倒了,结果摔到了自己的屁股。
He accidentally fell and landed on his bottom.
Xiǎo gǒu zài lù shàng pǎobù shí bǎ tā de wěibā hé tā de pìgu shuǎi lái shuǎi qù.
小狗在路上跑步时把他的尾巴和他的屁股甩来甩去。
The little dog wagged its tail and butt while running on the street.
Tā zuò zài nàlǐ, yī shǒu pāizhe zìjǐ de pìgu.
他坐在那里,一手拍着自己的屁股。
He sat there, patting his own butt.