a frozen rocky mountain oyster on a stick (as mentioned on EPISODE S1E1 Space Pilot 3000 of Futurama)
Guy: They're tasty, right? Let's call 'em "Tasty-cles"
Girl: We can't call them that.
Guy: Why not?
Girl: It sounds too much like those frozen rocky mountain oysters on a stick. You know, testcicles!