bright as a button

adj — 2 senses

bright as a button

adj

1

Very intelligent.

You needn't plague yourself about her no how, because she's bright as a button, and knows all about what you want and what you don't wan't ^([sic]), as well as a sensible being.1868, Sarah Stuart Robbins, Ned's motto, page 42:

2

Very cheery, energetic and upbeat.

Synonyms: bright as a new button, bright as a new coin, bright as a new dollar, bright as a new penny, bright as a new pin

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.