- 生日快乐 shēngrìkuàilè happy birthdayA greeting used to wish someone a happy birthday.
- 新年快乐 xīnniánkuàilè Happy New YearA greeting used to wish someone a happy New Year.
- 快乐主义 kuàilèzhǔyì hedonismThe ethical theory that pleasure or happiness is the highest good and the proper goal of human life
- 快乐大本营 kuàilèdàběnyíng Happy CampLong-running Chinese variety show produced by Hunan Broadcasting System
- 助人为快乐之本 zhùrénwéikuàilèzhīběn pleasure from helping othersHelping others is the source of happiness.
- 节日快乐 jiérìkuàilè happy holidaysa standard greeting used to wish someone happiness during a festive season or holiday period
- 圣诞快乐 shèngdànkuàilè Merry ChristmasMerry Christmas; a holiday greeting used during the Christmas season
- 快乐丸 kuàilèwán EcstasyA common name for MDMA, an illegal stimulant drug that causes intense physical activity and sensitivity to light and sound; same as [[摇头丸|搖頭丸|yao2 tou2 wan2]]
