SMH

"so much honest"

this is the actual official historical definition. used to show agreement

chad: "hey, what does SMH stand for?"
britney: "so much honest"
charlie: "not it's shake my head"
britney: "no dumbass, that's a lie made up by the government to oppress the people"

~~~~~~~~~~~~

chad: "Charlie is so dumb, he listens to whatever the government says"
britney: "smh"(so much honest)