U
Underdog Alpo, dog, puppy
A team, side or contestant in any given event considered to be the least likely to win.
Units
Unit per game refers to a standard monetary measurement – typically between 2-4% of your bankroll. For example if your bankroll was $1000, one unit would be between $20 and $40. Then if you noticed a system that had won 15 units over the season, you could easily calculate your earnings by taking the units earned and multiply them by your standard betting unit (in this case, $20 x 15 units = $300).
Underlay
When the odds on a proposition are in favor of the house.
Uppercut Boxing & MMA
A vertical, rising punch thrown with the rear hand. From the guard position, the torso shifts slightly to the right, the rear hand drops below the level of the opponent’s chest and the knees are bent slightly.
