What is "skillo"

Usage examples of "skillo".

They walked down the Midway, past the Skillo games and the Fascination booths and the Three-Card Monte tables and the Bozo cage, past the Wax Museum and the concession stands, past the specialty tent where Billybuck Dancer put on his Wild West Show Three Times Nightly, past the makeshift wrestling ring where the carnival offered 50-Credits-50 to anyone who could stay five minutes with Julius Squeezer, their green-skinned and slightly reptilian muscleman from far Antares.