1. [late 17C; mid–late 19C] credit; esp. as on sock, on credit.
2. [late 17C] a farthing.
3. [late 17C–18C] a pocket.
4. [1920s–50s] anything used a receptacle for money, e.g. a wallet, a purse.
5. [1930s–50s] the store of money itself, as hidden away in a bag, safe etc; a sum of money.
6. [1970s] a filthy, messy room, i.e. as used by a student, young man etc. [coined by UK novelist Martin Amis (b.1949) and enjoyed brief popularity].
SE in slang uses
see bet one’s boots under bet v.
[mid-19C+] used as an intensifier, e.g. blow the socks off v.; knock the socks off under knock v.; lick the socks off under lick v.1 ; rot someone’s socks off under rot v.; see also synons. at fuck v., pop v.1 (1), screw v.
[1910s+] to stop talking, to be quiet; esp. as imper. put a sock in it!
[1910s+] a bachelor, a single man, supposedly what ‘every woman wants’.