The term 'Wanna Bet?' is a phrase used to challenge someone to a bet or wager. The crossword solutions for this term are CANTI (5 letters), ONIT (4 letters), OHYEAH (6 letters), and IDOUBTIT (8 letters). CANTI is an acronym for 'Challenge Accepted, No Take-Backs, ' which is a phrase used to accept a challenge without any reservations. ONIT is an acronym for 'Oh No, I'm Taking, ' which is a phrase used to accept a challenge with some reservations. OHYEAH is an expression of enthusiasm and agreement, often used when accepting a challenge. Finally, IDOUBTIT is an expression of skepticism and doubt, often used when declining a challenge.