M.H.S is an acronym related to gaming which means Minecraft Herobrine Survival. Dumb little kids use this as a quick way to ask their friends to play that particular game mode with them.
For anyone who has every felt the pain train of a Sunday hangover after a weekend of binge drinking. There is nothing like a "Super Awesome Medicinal Sunday Hangover Bacon and Tomato Sandwich" (S.A.M.S.H.B.A.T.S.) to make someone feel better.