Dunder

//ˈdʌndə(ɹ)// noun, slang

noun, slang ·Moderate ·College level

Definitions

Noun
  1. 1
    The lees or dregs of cane juice, used in the distillation of rum. Caribbean, uncountable

    "The use of dunder in the making of rum, answers the purpose of yeast in the fermentation of flour."

  2. 2
    A double underscore, __. informal

    "Python has a dunder method, __iter__, that defines what the behavior is for looping over an instance."

  3. 3
    Distillery effluent. Australia, uncountable

Synonyms

All synonyms
sour mashstillagevinassevinhaca

Example

More examples

"The use of dunder in the making of rum, answers the purpose of yeast in the fermentation of flour."

Etymology

Etymology 1

Compare Spanish redundar (“to overflow”).

Etymology 2

Blend of double + under(score).

Related phrases

sour mash

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.