meaning, "shaking my head", smh is typically used when something is obvious, plain old stupid, or disappointment.

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

the meaning is 'shaking my head' often used when you're disappointed or embarrassed.

shaking my head or

so much hate.

Stands for "small macaronni hat", which of course we all know is the most shameful headgear

acronym that stands for "shaking my head"

Acronym for 'shake my head' or 'shaking my head.' Usually used when someone finds something so stupid, no words can do it justice. Sometimes it's modified to 'smfh' or 'smmfh' by those that prefer profanity in their internet acronyms.