Gordon Ramsay has been referring to Mario Batali as Fanta Pants since a feud erupted between the pair in the summer of 2007. The feud seems to have been caused by comments Batali made about Ramsay's food, describing it as dull and outdated, and claiming Gordon had no understanding of the importance of ingredients.
In retaliation, Ramsay refers to Mario Batali as Fanta Pants, an insult which Batali doesn't quite understand.
"Now he goes about town calling me Fanta Pants." What? Because you sometimes wear orange shorts? "I suppose."
Source: The Guardian