verb

• (transitive) To illegally take possession of (something, especially items of low value); to pilfer, to steal.
  "Hey, someone filched my wallet!"

noun

• (obsolete) A person who filches; a filcher, a pilferer, a thief.
  "A ſimple lad, with a whip in one hand, and the other locked in the arm of a young girl, is ſo loſt in gaping aſtoniſhment, that an adroit branch of the family of the Filches is clearing his pockets of their contents."
• (obsolete) A hooked stick used to filch objects.
  "Thus much for their fraternities, names, lodgings, and assemblies, at all which times everyone of them carries a short staff in his hand, which is called a filch, having in the nab, or head, of it, a ferme (that is to say, a hole) into which, upon any piece of service, when he goes a filching, he putteth a hook of iron, with which hook he angles at a window in the dead of night, for shirts, smocks, or any other linen or woollen. And for that reason is the staff called a filch."