tunnel bunny
A hooker, whore, prostitute. Term usually used to describe whores in big cities such as New York and Chicago because they stand and wait for customers in traffic tunnels.
"Hey Dad, Let's go into the city and check out the tunnel bunnies; you're paying this time!"
Tunnel bunnies
A person who digs a tunnel into a country illegally from another country
Imagration just caught a bunch of tunnel bunnies coming into the country illegally
Tunnel Bunny
Another name for the carrier used in pneumatic tubes at your bank.
John put his deposit in the tunnel bunny and hit the button to send it to the bank teller. It made a pleasing shoomp sound.