Looked down upon in society, especailly by those in the working class, a typical Mark is an A level reject, alcoholic, chain smoking wierdo. Such a person is extremely loud and it's more than a miricle that any level of productivity is achieved.
A normal Mark is unmotivated, avoids work where ever possible, lacks cash, enjoys playing cards during dinner breaks and spends many hours in the pub.
Mark - 'Any chance I can borrow a fag?'
A level student - 'Oi, BTEC, get your own fags you loser'