Wigan

(noun) If, when talking to someone you know has only one leg, you're trying to treat them perfectly casually and normally, but find to your horror that your conversation is liberally studded with references to (a) Long John Silver, (b) Hopalong Cassidy, (c) the Hokey Cokey, (d) 'putting your foot in it', (e) 'the last leg of the UEFA competition', you are said to have committed a wigan. The word is derived from the fact that sub-editors at ITN used to manage to mention the name of either the town Wigan, or Lord Wigg, in every fourth script that Reginald Bosanquet was given to read.

source : The Meaning of Liff