'Howzat' is an appeal in cricket. Before a
batsmen is given out, technically at least one person in the fieliding team must appeal. After an appeal the
umpire will give a decision as to whether a batsmen is out, or go to the third umpire if he is unsure on 'line' decisions - namely run-outs, stumpings, and whether
a catch is legitimate.
*
batsmen nicks the ball to the wicket-keeper*
bowler, keeper and
close-in fielders:
HOWZAT
*umpire raises finger* - signifying the batsmen is out.