quid: English has two words quid. The colloquial term for a ‘pound’ appears to be the same word as Latin quid ‘something’, and may have been inspired by the expression quid pro quo [16], literally ‘something for something’. Quid ‘piece of chewing tobacco’ [18] is a variant of cud. => cud
quid (n.1)
"bite-sized piece" (of tobacco, etc.), 1727, dialectal variant of Middle English cudde, from Old English cudu, cwidu (see cud).
quid (n.2)
"one pound sterling," 1680s, British slang, possibly from quid "that which is, essence," (c. 1600, see quiddity), as used in quid pro quo (q.v.), or directly from Latin quid "what, something, anything." Compare French quibus, noted in Barrêre's dictionary of French argot (1889) for "money, cash," said to be short for quibus fiunt omnia.
例文
1. I 'll pay you back that two quid tomorrow.
私は明日あなたにその2ポンドを返します。
2.It cost him five hundred quid .
これは500ポンドかかりました。
3.Can you lend me five quid ？
5ポンド貸してくれませんか。
4.He earns at least 300 quid a week.
彼は1週間に少なくとも300ポンド稼いでいる。
5.They share a great deal of information on a quid pro quo basis.