Oh the hilarity of that one... French people like to joke about belgian people being fries eater: anytime I hear that kind of joke I ask the french person "Do you know what 'frites' are called in most of the world and how they'll be called for posterity?".
The irony (as in "ironie du sort" / twist of fate) and the poetic justice of that one is plain delicious: the french have long made fun of the belgian for being fries eater, but the fate of the french is that fries in english are forever going to be known as french fries.
It cracks me up to no end : )