There are several synonyms for the phrase "fill one's pockets". Some alternatives include "line one's pockets", "pad one's wallet", and "stuff one's purse". These phrases all imply the act of accumulating wealth or money in a greedy or dishonest way. Other similar expressions include "feather one's nest", "pile up riches", and "accumulate fortunes". Regardless of the wording, all of these phrases suggest a self-serving attitude and a desire for financial gain at any cost. It is important to remember that while accumulating wealth is not inherently bad, doing so at the expense of others can have negative consequences both personally and morally.