shoofly - an undercover police officer who investigates other policemen.
colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
police officer, policeman, officer - a member of a police force; "it was an accident, officer"
shoofly - a child's rocking chair with the seat built between two flat sides that are shaped to resemble an animal (such as a swan or duck)
rocking chair, rocker - a chair mounted on rockers