quid

俚语，来自quid, pro quo,一物换一物。

quid

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.

1. I'll pay you back that two quid tomorrow.

我明天还你那两英镑。

2. It cost him five hundred quid.

这花了他500英镑。

3. Can you lend me five quid?

你借给我五镑钱行吗？

4. He earns at least 300 quid a week.

他一星期至少挣300英镑.

5. They share a great deal of information on a quid pro quo basis.

他们互通有无，共享大量信息。