Acronyms dictionary KMSL What does KMSL mean? KMSL is an acronym used in chat and messaging for killing myself laughing. It is often used as a hashtag to mark a funny moment. Examples of KMSL I LOVE MY GRANDMA BUT I COULDNT HELP MYSELF!!! KMSL THA TRUTH, YouTube, January, 2018 LOL... they did not know me before GOD took over! #KMSL @MinMiki1, February, 2018 When you walk in the bathroom behind the wrong person! #comedian #comedy #funny #lol #lmao #kmsl #rotflm... #Topbuzz@JohnZit81819703 @JohnZit81819703, April, 2018 SEE MORE EXAMPLES Just Added fictosexual, shacket, California sober, comfort character, grandfluencer Note This is not meant to be a formal definition of KMSL like most terms we define on Dictionary.com, but is rather an informal word summary that hopefully touches upon the key aspects of the meaning and usage of KMSL that will help our users expand their word mastery.