STFU full form is “shut the f*ck up”. It’s commonly used online when people are mad or annoyed at others.

S = SHUT

T = THE

F = F*CK

U = UP

OTHERS STFU FULL FORMS

Southern Texas Fertilizer Unlimited

Shreveport Times Forum Unhallowed

Scrawny Two Faced Underling

Snap The Farmers Underwear

Superior Tactical Fragging Unit

Save The Forum Unity

Save The Faithless Unbelievers

Society To Find Unconformities

Special Transitory Food Unit

Socks Television Fascist Underwear

Steal The Funky Unicorn

Street Tried Fords Unlimited

Stop This Foolish Ululating              

 Smells like The French Union

 Southern Tenant Farmers Union

 Super Toga Football Umbrella

 Smell The French‘s Underwear

Southern Tenant Farmers’ Union

Save The Flying Unicorns

Sound Technology Fashion and U

 Star Trek Federation University

Shut the Face Up

Shut the Freak Up

Security Testing For Utilities

So Thankful For U

Stop Tickling Fluffy Unicorns

 Stop Tickling Furry Unicorns