According to Urban Dictionary, STFU stands for shut the f"ck up. This chat slang term is a very rude way of telling someone to be quiet. This term is often used in a joking way with someone one is close with to tell them to knock it off, or to stop talking about a certain topic. The meaning or full form of STFU is " Shut The Fu#k Up ". “STFU” stands for “Shut The Fuck Up.” It is used to express frustration or anger, often telling someone bluntly to stop talking. This phrase can be offensive and is typically considered inappropriate in formal or polite conversation. The acronym STFU stands for shut the fu (k up. It's often used when people are angry or upset with someone, usually online. _______________ "Shut up" is a direct command with a meaning very similar to "be quiet", but which is commonly perceived as a more forceful command to stop making noise or otherwise communicating, such as talking. The phrase is probably a shortened form of "shut up your mouth" or "shut your mouth up". Its use is generally considered rude and impolite, and may also ...
