Pronunciation: [mˌe͡ɪd bˈʊk ˈɒn] (IPA) 
The spelling of the phrase "made book on" is relatively simple. The first word, "made," features the long "a" vowel sound /eɪ/ and the voiced /d/ consonant sound. The word "book" is spelled with double "o" vowels, which sound like /ʊ/ and /k/ and are followed by the schwa sound /ə/. The preposition "on" is spelled with a short "o" sound, similar to /ɒn/. Altogether, the phrase is pronounced /meɪd bʊk ɒn/.
"Made book on" is an idiomatic expression typically used in various contexts, such as gambling or predictions, to describe the act of placing a wager or bet on a specific event or outcome. This phrase is commonly used among bettors, bookmakers, or individuals who engage in speculative activities.
When someone "makes book on" something, they are essentially creating or accepting bets on a particular event or situation. It signifies that they are acting as a bookmaker, offering odds or accepting wagers from others. This term is often associated with sports betting, where individuals can make book on the outcome of a game, tournament, or other sporting events. For instance, a person might say, "I'm making book on the upcoming basketball match," meaning that they are accepting bets on which team will win or predicting various aspects of the game's outcome.
The phrase "made book on" can also be used metaphorically to indicate a confident prediction or assertion about a future event. It implies that the person believes their prediction to be accurate or has substantial knowledge about the matter at hand. In such cases, this expression is colloquially employed to indicate a high level of certainty or confidence in one's prediction.
Overall, "made book on" is an idiom that denotes the act of placing bets or wagers, typically in a gambling or speculative context, or serves as a metaphorical expression to signify a confident prediction about a future event.
