Middle order
the batsmen who bat at between roughly number 5 and 7 in the batting order. Often includes all-rounders and the wicket-keeper. Mid-off
a fielding position intended to save a run on the off side, located in front of, and relatively close to, the line of the wicket. Mid-on
a fielding position intended to save a run on the leg side, located in front of, and relatively close to, the line of the wicket. Mid-wicket
a fielding position intended to save a run on the leg side, located between mid-on and square leg. Military medium
medium-pace bowling that lacks the speed to trouble the batsman. Often has derogatory overtones, suggesting the bowling is boring, innocuous, or lacking in variety, but can also be a term of praise, suggesting a military regularity and lack of unintended variation. A good military medium bowler will pitch the ball on the same perfect line and length for six balls an over, making it very hard for the batsman to score runs. Milking (or milk the bowling)
Scoring a steady stream of easy runs at a moderate rate with little risk of getting out, by taking advantage of poor bowling or gaps in the field. Particularly common against spin bowling in limited overs matches, due to the circle restrictions. Mine 
see call

Mis-field
a fielder failing to collect the ball cleanly, often fumbling a pick-up or dropping a catch. Mullygrubber
(Australian) see grubber

N
Negative bowling
a persistent line of bowling down the leg-side of a batsman to stymie the batsman from scoring (particularly in Test matches).
Today, biffers tend to be known as big hitters. Bite
the turn a spin bowler is able to produce on a pitch. Block
A defensive shot, intending to stop the ball safely without attempting to score runs. The most common form of block is the forward defensive. Blocker
slang term for a defensive or slow-scoring batsman, the opposite of biffer. In earlier times (particularly pre-World War II) cricketers were either professional or amateur. Typically, but not universally, amateurs would be "biffers" and professionals "blockers". The word derives from the natural tendency of such batsmen to "block" each delivery, rather than try to score runs. Such players tend to have low strike rates, but in many cases high averages due to their lack of aggressive shots giving bowlers less chances to dismiss them. They are typically less effective in limited overs cricket where quick scoring is often needed, though some are able to adapt their game to score quicker in the shorter formats of the game. Block hole
the gap between the bottom of the bat and the batsmans toes. This area is the target for a yorker, as it is difficult to block unless the batsman is expecting it. Blob
See duck

Bodyline (or fast leg theory)
a historical tactic involving fast bowling aimed at the batsmans body with numerous close fielders placed on the leg side. Bodyline was developed in the early 1930s and used by England (who called it "fast leg theory") during the 1932–33 Ashes Tour.