Definition of scalp lock in US English:

scalp lock

(also scalplock)

noun

historical
  • A long lock of hair left on a shaved head, especially as worn by a North American Indian as a challenge to enemies.

    • ‘The practice of wearing a scalp lock extended as far west as French hussars of the early 18th century.’

Pronunciation

scalp lock

/ˈskalp ˌläk/