The full sentence is γγε¬γδΈγγγ«γͺγ£γ¦γγ γγγ, which is basically ε°ζ¬θͺ or honorific language. More casually, something like ε¬γδΈγγ£γ¦γγ γγ would be equivalent.
ε¬γ is a pretty vague verb, but due to the polite way she's saying it, I'd guess "Please have your fill", which also retains a sort of metaphoric quality. EDICT lists ε¬γδΈγγ as a compound specifically meaning "to eat", though, so I'm a little confused as well.
What are you thinking about, you dog!!The princess's boobs are so big β₯Go ahead... Please dig right in...