toke
n.— «While raking in some of my misplaced chips, a craps dealer explained to me that on good nights a personable dealer can make $500 in tips, or “tokes,” as he called them.» —“What Happened in Vegas Stayed in Vegas His Novel” by Charles McGrath New York Times Magazine Jan. 27, 2008. (source: Double-Tongued Dictionary)
Further reading
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...
In an article in The Atlantic magazine, humorist Mark Twain quoted a sing-songy bit of doggerel about conductors punching railroad fares that illustrates how colored paper has long been used to encode information. This is part of a complete episode...
Yup, a toke is definitely a tip for the dealer at the casino table games.