plural noun
- socks that reach above the ankle and are sometimes folded down to the ankle.
adjective
- indicating or associated with the wearing of bobbysocks; adolescent: strictly a bobbysocks crowd; the bobbysocks generation.
pl n
- ankle-length socks worn by teenage girls, esp in the US in the 1940s
1943, from diminutive of bob (n.2) + sox. So called because they are “shortened” compared to knee-socks. Derivative bobby-soxer first attested 1944.
Months ago colored bobby sox folded at the top were decreed, not by anyone or any group but, as usual, by a sudden mysterious and universal acceptance of the new idea. Now no teen-ager dares wear anything but pure white socks without a fold. [“Life” magazine, Dec. 11, 1944]