the.com/wad

A compact lump of something, or the cash you're pretending not to flash.

means A small, tightly packed mass of material, or a bundle of banknotes folded or rolled together.

from Wad has murky roots, traced back to Middle English 'wadde,' meaning a bundle of material such as straw or cloth used for padding or stuffing. It's possibly related to similar words in other Germanic languages for cloth or stuffing material, though the exact lineage is uncertain. The 'bundle of cash' sense emerged later, a natural extension once people started rolling and folding bills the way you'd wad up any soft, compressible stuff.

origin
Old English wadd meaning bundle of material
usage shift
came to mean rolled-up money by 1800s
idiom
shoot your wad means spend everything at once
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