CRICKET JARGONS : "U"

Umpire
One of the two (or three) imposers of the convention and panel of judges of play.
Umpire Decision Review System
(UDRS, or simply Decision Review System or DRS) A system which agree to the fielding chief or the batsmen to ask for the third umpire to appraisal the standing umpires' prior decision using technical aids, in the expectation of having a firing awarded (in the case of the fielding skipper) or reversed (in the holder of the batsman).
Underarm
The deed of bowling with the arm wavering from behind the body in a downswing arc and then liberating the ball on the up swing devoid of bending the elbow. This sort of bowling is now illicit in proper cricket, but usually played in casual types of cricket.
Under-spin (also back-spin)
Toward the back rotation on the ball, causing it to lessen speed immediately after plunging.
Umorthodox
A shot played not in the established "textbook" manner, frequently with a degree of creativeness.   A left arm spin bowler who spins the ball with his wrist. This conveys spin in the same course as a right-handed off spin bowler.
Unplayable delivery
A ball that is not viable for the batsman to contract with; used to imply that the batsman was out more in the course of the skill of the bowler than through his own mistake.
Uppercut
A classic shot play in opposition to short ball or bouncer. Here the batsmen creates a cut above his head and the generally goes to the third-man region.