Definitions by kkbby

stfu mf-er 

pronounced: es-tee-ef-you-em-ef-er. a way of saying: shut the fuck up mother fucker.

used in texting, short hand messages, or even in a stressful situation; if someone insults me I'm like, "STFU MF-ER!"

stfu mf-er by kkbby June 19, 2009