You're no oil painting, mate.I think another way to describe it is....
Punching above his weight
Won the lottery without buying a ticket
the jammiest bastard in the history of man, what the fuck she sees in him is anybodys guess, I can only assume it was an arranged marriage as no fucker would look twice at him, unless it was to punch him which it seems someone has done many times. Mind you they do say that nurses often fall for their patients, perhaps as his Carer, Lisa found an inner beauty (as there is nothing on the outside)