An offensive term to call someone an idiot or to imply that they are stupid.
Person A gets a question wrong on the pub quiz machine;
Person 2 : "You big dogs cock".
Using only a day of annual leave to make a long weekend after an on-call 24hr shift.
Working a 24 hour shift on-call on a Wednesday (which results in having Thursday off as a rest day) and booking the Friday off as annual leave for a long weekend. If you were the person working the on-call shift, you would say that you are 'doing a davies' to imply that you are taking Friday off also.