Green’s Dictionary of Slang

flick n.1

[the word orig. appeared as afflicke (albeit at F in the A–Z listing in Rowlands’ Martin-Mark-all, 1610) and has always been assumed, by the OED and others, to have been a misprint of a flick. That said, it has no proven ety. and may indeed be one, equally incomprehensible word]

a thief.

[UK]Rowlands Martin Mark-all 38: Afflicke, a Theefe.