"Living the life of Riley" is an idiomatic expression that means living a life of luxury, ease and opulence. There are numerous synonyms and alternative phrases that can be used to convey a similar meaning. Some common expressions and synonyms include "living in style," "living like a king," "living high on the hog," "living the dream," "living the good life," "living in luxury," "living large," "living in comfort," and "living in affluence." All of these phrases and synonyms describe a comfortable, abundant life in which one has access to all the resources and comfort they could need or want.