Green’s Dictionary of Slang

1. (US) a woman who specialises in recruiting new girls for a brothel.

1850

Life in Boston & N.Y. (Boston, MA) 18 May n.p.: The mistress of this precious establishment has long been known as a sly old ‘ketcher’ and merits the attention of the police.

2. see flat-catcher n.¹ (2)

3. see stash catcher under stash n.¹