Is there any idiomatic expression in American English for eating too much? I would especially want to have an expression that could be applied in a situation when the action of excessive eating is taking place at the moment of speaking. For example, if the idiomatic expression is, say, "to expand one's belly" then it could be used this way in the following situation:
Having spent the whole morning looking for Jack, Peter finally gave up and decided to have a cup of coffee at the "Swagger's". As soon as he entered it, he saw Jack sitting inside at one table and consuming probably the third portion of his favorite smoked chicken. "Here you are/he is!" cried Jack with anger. "I've been running everywhere trying to find you/him, but you are/he is sitting here and expanding your/his belly! Very nice!"