Lyric discussion by BoHo 

Cover art for Mardy Bum lyrics by Arctic Monkeys

Mardy is a Nottingum [Nottingham] expression

Mardy bum - is said to a girl Mardy bugger - is said to a boy

Its another word for grumpy or downbeat.

Other Nottingum expressions that may be included in a forthcoming Monkey's album include:

Tabs = ears Tegs = teeth Geggs = glasses A-up me duck = Hello there Monk On = feeling of unhappiness It's a bit black over bills mothers = weathers awful Youf = young person

:-)