- Call
- The position of each horse, relative to the other horses, at specific points around the track during a race.
- Canadian
- A multiple bet consisting of 26 bets (10 doubles, 10 trebles, 5 4-folds and 1 5-fold) with 5 selections in different events (also known as a "Super Yankee").
- Canadian Line
- A hockey line expressed as a money line.
- Career Record
- An official form showing the current statistical records of each racing horse. The form has a series of five numbers indicating, in order, a horse's total number of starts and its totals of first, second, third and fourth place finishes. The career record is often preceded by an abbreviation showing the track at which the start(s) were recorded.
- Carpet
- UK slang for odds of three-to-one. Also known as "tres" or "gimmel".
- Carpet Joint
- Slang term referring to a luxury casino as compared to the less showy, lower minimum gambling houses, i.e., sawdust joints.
- Chalk
- The favored team, side, contestant or horse in a sports event.
- Chalk-Eater/Chalk-Player
- A player who tends to wager only on the favorites, rarely on the underdogs.
- Chart
- A record of each race showing finish, calls, odds and comments describing the performance of each racer. The chart is considered a useful statistical aid to handicappers for studying the past performance of each racing horse.
- Chartwriter
- A statistician who compiles records and writes comments describing the performance of each horse or player.
- Circled Game
- When the sportsbook limits the action it's prepared to take on a particular event, usually due to to uncertain weather, significant injuries or unconfirmed rumors regarding a contestant or team.
- Class
- A classification of the racing ability used to compare greyhounds or horses. Also, see, Grade.
- Clone Joint
- A sportsbook that moves lines to conform with other sportsbooks.
- Close
- The final odds given on a race before it begins (US). Also referred to in the UK as the Starting Price.
- Combination Bet
- A wager on two, three or four horses, in combination, to cross the finish line in a specific order.
- Commerce Course
- A distance classification referring to the Commerce Course at Mile High. Also see Middle Distance.
- Compound
- An area at the racetrack where the racing association houses racing greyhounds or horses.
- Comps
- Complimentary gifts used by casinos to entice players to wager. Typical comps include free room, food and/or beverage (RFB).
- Course
- Refers to the general area from the starting box to the wire during a particular race. The most common distances in the US are five-sixteenths, three-eighths and seven-sixteenths mile courses.
- Cover
- To bet the point spread by the required number of points. If a wager is made in this way, the player is said to have covered the spread and stands to win an event by more points than he laid, or lose by fewer points than he had taken.
- Credit Player
- A sportsbook customer who has been given an individual wager limit and can play against that limit on a credit basis. Normally, the credit player belongs to an agent's package.
- Crow's Nest
- A high vantage point where the racetrack announcer, judges and other officials sit to observe the races.
