When the batsman wilfully blocks or distracts a fielder to prevent a catch being made or a run-out being effected.
A non-batsman promoted up the order towards the end of a day's play with the idea of shielding a recognized batsman in the final overs.
To hit the ball from the meat of the bat, "to middle it" is to connect really well. Middle is also the centre of the field, where the bulk of the action takes place.
An over where no runs that are attributable to the bowler are scored (byes or leg-byes may be scored in this over, though, as these don't count against the bowler)
If a batsmen deliberately strikes the ball twice to gain runs he can be given out. However, the batsman can knock the ball away from his stumps with the bat.
A tracking technology which helps to explain the intricacies of the sport, Hawk-Eye can be helpful in judging LBWs. At the moment it is used mainly for arm-chair umpiring, although one day it may be used in an official capacity.
If the batsmen deliberately touches the ball with his hands he can be given out. Michael Vaughan fell victim to this in India on 2002-03 tour in Bangalore.
The act of the batsman repairing indentations in the pitch, made by the ball or studs, with his bat. More likely to happen when a ball has just whistled past his nose or scooted by his ankle.