The noun 小丑 (xiǎochǒu) means 'clown,' referring to a comic performer often seen in circuses or entertainment. It is composed of 小 (small) and 丑 (ugly/comical). It can also be used figuratively as an insult to describe someone who is ridiculous or makes a fool of themselves.
马戏团的小丑逗得孩子们哈哈大笑。
Mǎxìtuán de xiǎochǒu dòu de háizimen hāhā dà xiào.
The circus clown made the children laugh out loud.
他在派对上打扮成小丑,特别搞笑。
Tā zài pàiduì shàng dǎbàn chéng xiǎochǒu, tèbié gǎoxiào.
He dressed up as a clown at the party, and it was really funny.
别当小丑了,认真点行不行?
Bié dāng xiǎochǒu le, rènzhēn diǎn xíng bù xíng?
Stop being a clown — can you be serious?