Knobo
Knobo is a term generally referring to an uneducated and unrefined British male carrying on in a loutish manner. It can also refer to an educated and refined male acting in an uncultured way, like drinking fine champagne out of some random person, from the next table's, shoe. It can also be used for the typical Brit on football holiday like Chav or Numpty however knobo combines the words knob and yobbo to add both elements of humor and disappointment to the particular behavior.
Upon seeing a man driving along with his car roof down in weather conditions below 15 degrees Celsius one may exclaim.. What a knobo!