An overbet is a bet that is larger than the current size of the pot (for example, an all-in ). Changes in poker strategy, driven by high-stakes players, have made the overbet a common weapon among skilled players with the knowledge that it puts their opponents in tough situations.
That you're either betting on teams to score more than the total, or less than the total. If the combined total is 41.5 and the game ends 28-21, the over would win, since the combined total would be 49 points. If the game ends 13-10, the under would win, since the combined total would be 23.