An undercover informer.
One who ropes goods; a packer.
Synonym of outside man (“accomplice who locates a mark to be swindled by a confidence trickster”)
Any of a variety of monsters with tentacles that they use to capture victims.
A person hired by a gambling establishment to locate potential customers and bring them in.
A private detective
The act of snooping
One who snoops
To secretly spy on or investigate, especially into the private personal life of others.
To be devious and cunning so as not to be seen.