1560s, originally a name for a sharp or cheat, "who deceived tradesmen by substituting empty boxes for others full of money" [Robert Nares, "A Glossary of Words, Phrases, Names, and Allusions," London, 1905]. As a type of toy, it is attested from 1702.
例文
1. Jack had attended these meetings as a matter of routine for years.
数年来、ジャックはこれらの会議に参加することをルーチンと見なしてきた。
2.Auntie Hilda and Uncle Jack couldn 't fuss over them enough.
ヒルダおばさんとジャックおじさんは彼らをかわいがっている。
3. Jack took out his notes and talked for just under an hour.
ジャックは彼のノートを取り出し、1時間近く話した。
4.An American judge yesterday dismissed murder charges against Dr Jack Kevorkian.
昨日、米国の裁判官がジャック?ケヴォルキアン医師の殺人容疑を却下した。
5."It 's not that I don 't believe you,Meg," Jack said,unconvincingly.「あなたを信じていないわけではありません、メグ。」ジャックは腹を割って言った。