O and U are abbreviations for Over and Under in sports betting, which relates to totals betting. This type of bet involves placing a bet on whether the actual score of a game will be over or under a predetermined number of points (the “line“). O and U are typically seen on an online sportsbook in the section dedicated to totals betting. This section will list the various lines available for different games, and the corresponding O and U options will be next to each line.
Best Online Sportsbook for Over/Under Totals Betting
United States
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Canada
BetOnline
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AustraliaCanadaUnited States
Minimum deposit $10 Crypto
BetUS
Lucky Rebel
Bookmaker
Crypto Bonus20% Cash up to $500
CanadaUnited States
Minimum deposit $50 (card) / $100 (crypto)
MyBookie
Crypto Bonus100% up to $1000
CanadaUnited States
Minimum deposit $20 (crypto) / $45 (card)
Bet105
BetAnything
Pinnacle
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Australia
BetOnline
No Strings Welcome Offer50% up to $250
AustraliaCanadaUnited States
Minimum deposit $10 Crypto
5Dimes
Sign Up Offer50% up to $2000
AustraliaCanadaUnited KingdomUnited States
Minimum deposit $50