(historical, early 19th century) One of a class of rogues who carry snuff or dust in their pockets, which they throw into the eyes of people so as to enable their accomplices to rob them while pretending to help them.
“He should have knowed better than to tangle with you, Miss Lindsay. Where did you learn to be an amuser, then?”
“The project is being conducted in conjunction with QSTP partners, including Qatar University Wireless Innovations Centre, Vodafone, Technogym, Amuser, and Fuego.”