fartnite barbeque burger

Something to say in response to being called dumb, or idiotic. Its significance stems from it being nonsensical.

A: What's rigatoni?
B: Oh I know that, isn't it that thing where your muscles get stiff after you die?
C: No no no isn't it that cartoon about those two smart guys?
D: you guys are so dumb, Rigatoni is a type of pasta.
B and C: fartnite barbeque burger.