lol
informal (also LOL) uk/lɒl/ us/lɑːl/
哈哈哈（laughing out loud的缩写，在社交媒体或手机短信中谈及好笑的事情或开玩笑时使用）
abbreviation for laughing out loud: used, for example on social media and in text messages, when you think something is funny or you intend it as a joke
I put my pants on back to front this morning lol. 我今天早上把裤子前后穿反了，哈哈哈。