1. [mid-17C+] in pl., money; thus phr. not for quids, not for anything.
2. [late 17C–mid-19C] a guinea.
3. [19C+] (also quidsy) a pound sterling; thus half-a-quid, ten shillings (50p).
4. [mid-19C] (US Und.) $5.
5. [late 19C] the vagina.
6. [1960s] (US black) a dollar bill.
[1990s] (Aus.) a large amount of money .
[late 19C] (UK Und.) first-class, expert thieving.
[1920s+] (N.Z.) for anything in the world, e.g. I wouldn’t miss your birthday for quids.
[early 19C+] half a guinea; then ten shillings; latterly 50p.
[1920s+] (Aus./N.Z.) money that is earned quickly and, poss., illicitly.
[1910s+] doing well, financially or otherwise.
[late 19C–1900s] a certain bet; esp. in phr. it’s a quid to a bloater.
[mid-19C] (UK Und.) to spend money hedonistically.