Hehe, yeah, he's been using phrases like "I'll chew you up in one bite" and the like so often that somebody started it as a joke and it just kind of stuck!

[He laughs before a mixture of emotions flickers over his face.]

Oh. I'm sorry about that. Your uncle shouldn't have done something like that.

[which is quickly followed by amused disbelief.]

No way, demons? Is that your version of Duel Monsters?