SMH (Shake My Head)

In internet slang, "SMH" stands for "shaking my head." It is often used to express disapproval, disappointment, or frustration with someone or something.

When is SMH used?

If someone says something particularly ignorant or offensive, another person might respond by saying "smh" to express their disappointment in the person's words. 

Alternatively, someone might use "smh" to express frustration with a situation or decision that they disagree with. On social media, "smh" is a way to express a negative reaction to someone or something, and is often used in informal or online communication.