Feast your Eyes

Isaac: “Jack said a bad word at school today.”
Richard: “That’s not good.”
Isaac:  “He said ‘Fist your Eyes’.  That means punch you in the eyes.”
Richard: “Are you sure he didn’t say ‘Feast your Eyes’?  That’s not bad.”
Isaac [showing the actions]: “Yeah, that’s it.  That’s worse.  That means pull your eyes out and eat them!”
Richard: “I don’t think that’s what it means.”
Isaac: “Yes it does!”