It’s fun when you can get a joke in another language, even if it is middle school potty humour. I’ve come across this joke before, and it’s a funny demonstration of the pronunciation differences between Chinese and English.
The dialogue in English and Chinese (with mouseover pinyin) is below the video clip:
Kid: [Mouth] 猫屎！ Cat poo! Teacher:对！ Correct! Kid: [Earth] 耳屎！ Earwax! Teacher:好！ Good! Kid: [Bees] 鼻屎！ Snot! Teacher:最后一个！ Last one! Kid: [Last] 拉屎！ Go poo! Teacher:全答对了！ 拉完屎之后呢……？ All answered correctly! And after going poo…? Kid: [Yes] 爷死！ Grandpa dies! Kid: [Nice] 奶死！ Grandma dies! Teacher: OK! Kid: [Bus] 爸死！ Dad dies! Teacher:哦，好！ Oh, great! Kid: [Knees] 你死！ You die! Teacher:嗯 Mmm-hmm. Kid: [Was] 我死！ I die! Teacher:好！ Kid: [Does] 都死！ All die! Teacher:都死之后？ After everybody dies? Kid: [One dollar] 完蛋了！ (We’re) doomed! [lit. “The egg is done”; fig. “We’re done for/doomed/finished/toast”.] Teacher:全答对了！ All answered correctly!