That's almost double what most of us actually consume. Potassium is found in a wide range of foods, especially fruits and vegetables such as leafy greens, tomatoes, cucumbers, zucchini, eggplant, pumpkins, potatoes, carrots and beans. It's also found in dairy foods, meat, poultry, fish and nuts.
Definition of rack. 1  1 : a framework for holding fodder for livestock. 2  2 : an instrument of torture on which a body is stretched. 3  3a (1) : a cause of anguish or pain (2) : acute sufferingb : the action of straining or wrenching.  4 : a framework, stand, or grating on or in which articles are placed.
It means to have a lot of money. Typically this is used to describe income gained through the drug trade. Racks are stacks of paper (money). So if you have racks on racks on racks then you have piles of cash. The term was made gained popularity in hip hop culture after the song by YC.