Lmbo is a more appropriate version of Lmao for people who want to kiss their mother with a clean mouth. It stands for "Laughing my butt off", "Laughing my bones off", "Last mountain bird observatory", "Little mister Bobby Opal", or "Lying my behind off".
an abbreviation for the commonly used term "lick my butt hole". Is most commonly found being used by a jack. Originated in the United stats, lmbh, has found its way all the way to germany!