STFU, (shut the fuck up), is a word commonly used in texting and online chatting systems. It is to tell a person to be quiet and don't talk because your tired of them.
“Shut the fuck up”, used when really mad and someone is being an annoying asshole. Works better thananything else because if you yell this people will definitely listen to you, and maybe be scared.
Random annoying ass: h-hey did you watch the dream video???”🤓🤓🤓it was so sussy and chaotic I wear a mask with a smile for hours at a time
Normal person: SHUT THE FUCK UP BITCH!!!!!!NOBODY GIVES A SHIT. STFU YOU NASTY BITCH ASS DREAM STAN LOOKIN UGLY ASS.