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full of beans

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full of beans

1. Lively, energetic, in high spirits, as in The children were full of beans today, looking forward to their field trip. This expression has no valid explanation. [c. 1840]

2. Also, full of prunes. Acting foolish, talking nonsense, as in One cup of coffee won't hurt you-you're full of prunes. [c. 1930] Also see full of crap.

See also: bean, full, of

full of beans

mod. full of nonsense; full of hot air. Oh, be quiet. You’re just full of beans.

See also: bean, full, of

full of beans

1. Energetic; frisky: The children were too full of beans to sit still.

2. Badly mistaken: Don't believe him; he's full of beans.

See also: bean, full, of