In medicine, bile is a fluid secreted by the liver and used to help breakdown fats. Because it used to be associated with anger, feeling your bile rise is the same as feeling mounting anger.

How did bile get linked to anger? Pre-modern doctors believed there were four basic substances to the human body, called humours, one of which was yellow bile that controlled anger. It doesn't, but when you feel angry, you'll still hear that you have to swallow your bile.

Definitions of bile
  1. noun
    a digestive juice secreted by the liver and stored in the gallbladder; aids in the digestion of fats
    synonyms: gall
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    type of:
    digestive fluid, digestive juice
    secretions that aid digestion
  2. noun
    anger; irritability
    synonyms: anger, choler, ire
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    fury, madness, rage
    a feeling of intense anger
    enragement, infuriation
    a feeling of intense anger
    offence, offense, umbrage
    a feeling of anger caused by being offended
    indignation, outrage
    a feeling of righteous anger
    a passing state of anger and resentment
    dander, hackles
    a feeling of anger and animosity
    bad temper, ill temper
    a persisting angry mood
    annoyance, chafe, vexation
    anger produced by some annoying irritation
    dudgeon, high dudgeon
    a feeling of intense indignation (usually used in the phrase 'in high dudgeon')
    intense anger (usually on an epic scale)
    a state of fury so great the face becomes discolored
    irritation, pique, temper
    a sudden outburst of anger
    a feeling of annoyance at being hindered or criticized
    aggravation, exasperation
    an exasperated feeling of annoyance
    harassment, torment
    a feeling of intense annoyance caused by being tormented
    the feeling of being displeased or annoyed or dissatisfied with someone or something
    irascibility, quick temper, short temper, spleen
    a feeling of resentful anger
    conniption, fit, scene, tantrum
    a display of bad temper
    type of:
    any strong feeling
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