1. I〔底が抜けること〕
    • バケツが底抜けになった
    • The bottom fell out of the bucket.
  1. II〔限りのなさ〕
    • 底抜けのお人好しだ
    • He is hopelessly good-natured.
    • 底抜けの楽天家だ
    • His optimism knows no bounds.
    • 底抜けに騒いでいた
    • They were on [having] a noisy spree.
  1. 底抜け相場a market in a seemingly endless decline
    • 底抜け相場になった
    • The bottom fell out of the market.