Tā / zhēn / shì / gè / huó / bǎo / yì / kāi / kǒu / jiù / ràng / rén / xiào / gè / bù / tíng

他真是个活宝，一开口就让人笑个不停。

He is such a joker; the moment he opens his mouth, he makes people laugh nonstop.