STFU
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English
[edit]Phrase
[edit]STFU
- (Internet slang, text messaging, vulgar) Initialism of shut the fuck up.
- Synonyms: shut the front door, STFD (minced versions); keep one's mouth shut (see there for more)
- Alternative form: stfu
Proper noun
[edit]STFU
- (US, historical) Initialism of Southern Tenant Farmers Union.