Jam tomorrow

noun

Definitions

Noun
  1. 1
    Promised benefits that never arrive. idiomatic, uncountable

    "The “purposive” man ... does not love his cat, but his cat’s kittens; nor, in truth, the kittens, but only the kittens’ kittens, and so on forward forever to the end of cat-dom. For him jam is not jam unless it is a case of jam to-morrow and never jam to-day."

  2. 2
    The availability of a resource at a future date. broadly, idiomatic, uncountable

    "The consumption-possibilities curve illustrates the choice which must be made: more jam today means less jam tomorrow; less jam today means more jam tomorrow."

Etymology

From Lewis Carroll's Through the Looking-Glass (1871), where Alice is offered “jam to-morrow and jam yesterday — but never jam to-day”. This is a pun on a mnemonic for the usage of jam, iam in Latin (note i/j conflation in Latin spelling), which means “now”, but only in the future or past tense, not in the present (which is instead nunc).

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