开心果 (kāixīn guǒ) a funny person; be one’s heart delight

Usage:

“开心果”的原义是一种坚果的名字（这种坚果得名于它的果壳已经被打开，露出了果仁），因为在汉语中“开心”是“高兴、快乐”的意思，所以人们把那些开朗幽默，又能让比别人快乐的人称为“开心果”。
The original meaning of “开心果（kāixīn guǒ）” is the Chinese translation of the pistachio nut. In Chinese language, “开心（kāixīn）” is a synonym of “高兴（gāoxìng）” and “快乐(kuàilè)”, they share the same meaning of “happy”, so people call the funny or humorous persons who always make other people happy “开心果（kāixīn guǒ）”.

Sentences:

1、Tīngshuō tā cízhí de shíhou, wǒmen dōu hěn shīwàng, yīnwèi bàn’gōngshì cóngcǐ jiù shǎole yígè kāixīnguǒ.
听说她辞职的时候，我们都很失望，因为办公室从此就少了一个开心果。
We were very disappointed when we heard that she had resigned, because we lost a person who makes us very happy in the office.

2、Háizi kāishǐ xué shuōhuà le, tā chéngle jiārén de kāixīnguǒ.
孩子开始学说话了，他成了家人的开心果。
The baby begins to learn to speak, and his families are very happy with him .

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