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Etymology 1[edit]

From fat +‎ -y. Cognate with Dutch vettig (fatty, greasy), German fettig (fatty).


  • (UK) IPA(key): /ˈfæt.i/
  • (US) IPA(key): /ˈfæɾ.i/
  • (file)
  • Rhymes: -æti


fatty (comparative fattier, superlative fattiest)

  1. Containing, composed of, or consisting of fat.
  2. Like fat; greasy.
  3. (slang) Literally or figuratively large.
    • 2007, getting rid of weed smell tips
      Be careful of the taxi drivers out there though, I've heard they sell you drugs, drop you off at your hotel and then dob you in to the Thai Police to get a fatty reward!
    • 2007, A. Bryant, Disappointment to Say the Least
      Instead of going my normal route (ordering the book through the store, checking it out in person, and then ordering it online so I could get a fatty discount) I impulsively bought the book.
    • 2007, Rimma [1]
      I'm trying to get a fatty project done in a couple of hours right now.
Derived terms[edit]

Etymology 2[edit]

From fat +‎ -y (colloquialising suffix).

Alternative forms[edit]


fatty (plural fatties)

  1. (derogatory, slang) An obese person.
    It's hardly surprising, when it has to support that enormous gut! Lose some weight, fatty!
  2. (slang) A large marijuana cigar; a blunt.
    • 2004, Anthony Kiedis, Larry Sloman, Scar Tissue
      We went to Plaster Creek, smoked a fattie, and emerged doing somersaults and cartwheels and laughing.