The phrase "on the fat of the land" means living in luxury or being well-off. There are various synonyms for this phrase that can add color to your daily conversations or writing. Some of these synonyms include "living the good life," "living in the lap of luxury," "enjoying comfort and plenty," "in the pink," "successful," "prosperous," "affluent," and "well-heeled." Each of these phrases has its own unique connotation, so choose the one that aligns with the message you want to convey. By using these synonyms, you can add a little flavor to your language and impress others with your linguistic prowess!