have eyes bigger than one's stomach vs piggy

have eyes bigger than one's stomach

• To take more food on one's plate than one can eat; to be greedy. 

• To want more than one can handle. 

piggy

• slovenly, dirty 

• greedy 

• A toe. 

• A pig, a greedy person. 

• A member of the police. 

• A pig (the animal). 

• A guinea pig.