Green’s Dictionary of Slang

culing n.

also culling
[cule n. + sfx -ing]

(UK Und.) stealing (bags and purses) from carriage seats.

[UK]H. Brandon Dict. of the Flash or Cant Lang. 162/2: Culling – snatching reticules from the seats of carriages at races.
[UK]J. Archbold Magistrate’s Assistant (3rd edn) 444: Snatching reticules from a carriage – culing.
[UK]Hotten Dict. of Modern Sl. etc. (2nd edn) 125: CULLING, or culing, stealing from the carriages on racecourses.
[UK]Hotten Sl. Dict.
[UK]Rochdale Obs. 24 Dec. 6/2: ‘Culing’ is [...] robbery in vogue chiefly at race times. Whilst the attention of the ladies [...] is drawn to the winning horse, the thief abstracts reticules, silk bags, etc.