deep pocket
Also, deep pockets. A source of substantial wealth or financial support, as in The college relies on the deep pocket of one particular alumna. This term alludes to money-filled pockets. [Slang; 1970s]
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| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a scrap or morsel of food left at a meal. |
| deep pocket | |
noun | |
| a source of substantial wealth (usually plural); "a patron of the arts should have deep pockets" |