carelessly; aimlessly; without plan or direction. There was no planning. It was just hit and miss.We handed out the free tickets hit or miss. Some people got one. Others got five or six.
if something is hit and miss, you cannot be certain of its quality because it is sometimes good and sometimes bad We used a cheap printer, but the quality was a bit hit or miss.Weather forecasting used to be a very hit-and-miss affair.