At primary school we were privileged to see a play about pirates performed by semi-professional actors. Nicholas, the fattest boy in the school, kept heckling, saying "That wouldn't happen on a ship". After he'd said this a few times, one of the actors got so irritated that he stopped acting and said "How do you know that?". Fat Nick replied in a smug nim nim nim tone, "Because my dad lived on a ship for 5 years". To which the actor replied "And what was your dad, son, a barrel?".

And so "Fat Barrel Nick" was born.