Word.ws English Dictionary

RBF

RBF is the abbreviation of rat-bite fever.

RBF is the abbreviation of radial basis function.

RBF is the abbreviation of resting bitch face.

Meaning of rat-bite fever

Noun

rat-bite fever (uncountable)

  1. Spirillosis, or sodoku, transmitted by the gram-negative coiled rod Spirillum minus, found in Asia.
  2. Streptobacillosis, or Haverhill fever or epidemic arthritic erythema, a severe disease caused by Streptobacillus moniliformis
    Synonyms:
    RBF

Meaning of resting bitch face

Noun

resting bitch face (countable and uncountable, plural resting bitch faces)

  1. (derogatory, slang, vulgar) An angry or unpleasant look that does not accurately reflect the way a person is feeling or that the person assumes when not consciously controlling their expression.
    • A brassy blonde steps forward, and you can tell by her resting bitch face, that ultra-cruel look in her eyes, that she's the one in charge of this quasi-hostage situation.2013, Addison Moore, 3:AM Kisses, →ISBN
    Synonyms:
    RBF

Forms of RBF

pluralRBFs

Questions about RBF

What is RBF the abbreviation of?
RBF is the abbreviation of rat-bite fever.

Words near RBF in the dictionary

  1. RBBGs
  2. RBC
  3. RBCs
  4. rbd
  5. rbds
  6. RBF
  7. RBFA
  8. RBFs
  9. RBG
  10. rBGH
  11. RBH

Source and license

Adapted from Wiktionary: RBF (page history and authors); rat-bite fever (page history and authors); resting bitch face (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “RBF.” Word.ws, https://word.ws/rbf. Based on Wiktionary, CC BY-SA 4.0.