Definition of ropers:
(n) :
(slang) Synonym of outside man (“accomplice who locates a mark to be swindled by a confidence trickster”).
(n) :
A person hired by a gambling establishment to locate potential customers and bring them in.
(n) :
(slang) An undercover informer.
(n) :
One who ropes goods; a packer.
(n) :
(dated) A ropemaker (a maker of ropes).
(n) :
(gaming) Any of a variety of monsters with tentacles that they use to capture victims.