How much is a monkey in betting slang?

£500.

In practice

A monkey is £500. So "a monkey each way on the jolly" means £500 each way on the favourite, which costs £1,000 because each way is two bets.

The Funteron way: fans should not need to know any of this to have a bet. Funteron is designed to show every bet in plain words and in money: what it costs, what comes back if it wins and what you lose if it does not.

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Examples are illustrations, not live prices. Terms vary by bookmaker. 18+. Please gamble responsibly.