LMS could also mean "Laughing My Socks off" in a humorous way. It takes the original meaning of "Let Me See" and adds a twist of fun to it. When someone finds something to be perfectly comic, LMS is used to rate the level of funniness. Memes are always about wordplay and this form of LMS answers the fun spirit of net stupidity. Thus, if there is something in a meme that could make you laugh out loud, you might comment "LMS!" to relay your fun to the rest of the world.

Know more:https://myliveroom.com/forums/thread/108/What-are-some-alternate-meanings-of-LMS