Used as a response to everything

Almost like saying maybe

Using M emphasizes your indifference to the situation

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

M

an expression used when you don’t know what to say. got complimented? say “m”. don’t understand what someone is saying? say “m”. “m” can be used as a response for anything.

When texting or instant messaging it's used as a response to something awkward.

Short for MDMA (methylenedioxymethamphetamine)

Slang for the drug 'mentos'.
Highly addictive and is usually taken as a social drug, and breath freshener.