Meaning of xiǎo biàn:
xiǎo biàn
小便
Noun
urine; (euphemism) penis or vulva
Zhège bēizi lǐ bù yīnggāi yǒu xiǎobiàn.
这个杯子里不应该有小便。
There should not be urine in this cup.
Zhège xiǎo nánhái xuéxí rúhé qīngxǐ tā de xiǎobiàn.
这个小男孩学习如何清洗他的小便。
The little boy is learning how to clean his private parts.
Verb
to urinate
Háizimen yào qù cèsuǒ xiǎobiàn.
孩子们要去厕所小便。
The children need to go to the toilet to urinate.