That deep fried Mars Bar one annoys the crap out of me as well. And the sheep shagging. In fact, any clichéd regional/ethnic/gender-based observation used to get an easy laugh; the French are arrogant, Americans don't understand irony, Germans have no sense of humour, Scousers are thieves, women can't park...
Tediously overused, the lot of them. That's not to say there aren't funny ways to exploit these stereotypes, but simply mentioning them shouldn't be enough to get a laugh. Though sadly, it is.