Deep pockets is a phrase often used to describe a person, organization, or institution that has substantial financial resources. Some synonyms for the term include "wealthy," "well-heeled," "loaded," "flush," "affluent," "bountiful," and "opulent." Another term with a similar connotation is "fat wallet," which implies significant disposable income. Similarly, the term "deep or thick wallet" also implies that an individual has significant financial resources at their disposal. Regardless of the term used, having deep pockets or a fat wallet makes it easier for individuals and organizations to undertake expensive projects or support important causes.