1)
The strong wreak of booze on a professional's (lawyer, doctor, ad man) breath before sun down on work days only.
2) A level of halitosis only reached by beginning drinking
brown liquor circa 10:30am and not stopping all work day long.
3) Of or relating to Don Draper and his breath, at
the office on the show Mad Men. Considering he drinks all day, it must be just awful.