Green’s Dictionary of Slang

shoot-flier n.

[shoot-flying n.]

(UK Und.) a thief who specializes in snatching wallets, watches and similar small items.

[UK](con. 1900–30) A. Harding in Samuel East End Und. 283: Shoot-flier – A snatcher. The one who grabs a man’s watch and chain. Or his wallet.