Cog:

A routine arrangement. The master tapped the deck on their ends and blinked twice. Let me think now... uh-huh, that's clubs to win the next two hands and we'll lose the first three rounds of diamonds, and play no picture cards until they start betting recklessly. Ah, and the sniff - here it is - yes, two short sniffs, left nostril flared, so I'll have the backup Queen of Hearts stuck under the table with a bit of sticky spit ready for the next hand...