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.

The internet acronym for the words 'shake my head'. Usually used when disappointed in someone/something.

widely known as an internet acronym for "shaking my head".

a less known version that exists is "so much hate".

the second version is also acceptable when used in a sentence, although the person you are talking to may be confused and think you mean the first version

An acronym, used in blogs such as "Bossip," which means shaking my head.

meaning "shaking my head"
an acronym made up in a blog chat site by a user known as flyvince

usually meaning
"shake my head" or "shaking my head"

people also think its

"santa monica highschool"

")

so much hate