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jumping bean

jumping bean

1 7.3
A seed that moves because a baby moth lives inside it
  • noun
  • /ˈdʒʌmpɪŋ biːn/
  • US
translation icon : frijol saltarín
  • It's so weak now it must've been made outta jumping beans.
  • Mexican jumping bean
  • magical jumping beans

Examples

  • My brother bragged that I must have escaped the anthropoid chain and mutated into a line of kangaroos who lived on Mexican jumping beans.

    Fiction book (1994)
  • He had brought me a little jar of Mexican jumping beans.

    Fiction book (1991)
  • It's just a jumping bean.

  • I'm, uh, looking for the head jumping bean.

  • Faster, you Mexican jumping bean!

  • The human Mexican jumping bean strikes again.

    Fiction book (1995)
  • You give Reid sideburns and a bottle of brilliantine, and he's as Latin as, er... you know, er... as a Mexican jumping bean.

  • The children were fascinated by the tiny movements of the jumping bean as the moth larva inside caused it to bounce around.

  • I watched a jumping bean dance around on the table, its abrupt movements making everyone laugh.

  • He explained that a jumping bean is actually the seed of a plant that contains a larva, which makes it jump.

Synonyms

Mexican jumping bean
vsjumping bean
  • US
1 8.3

A seed from a Mexican shrub that jumps when a baby moth moves inside

is about stronger tumbling movement rather than small twitches
jumping seed
vsjumping bean
  • Specialized
9.9

A seed from Mexican shrubs that moves because a baby moth inside wiggles

is the general name without the botanical genus detail

Surface Forms

jumping bean singular
jumping beans plural

Morphology

jumping + bean

The meaning 'a bean that jumps or moves' is directly and compositionally built from 'jumping' (moving by jumping) + 'bean' (the seed), so a B1 learner who knows both words can infer the referent. This is a literal, descriptive compound found across languages and follows straightforward noun-modifier composition, making it fully transparent.

Etymology

Jumping bean is the name for a seed that seems to move because a tiny baby moth lives inside and wiggles. The moth pushes the shell so the bean wobbles and the jumping comes from the moth's movement, which is why we call it a jumping bean.