budget dust
n.— «Budget dust. A small cash amount relative to the company’s total dollar budget. Many managers are being told to spend less, but if you want to arm wrestle, try this: “Why boss, that program accounts for just budget dust; let’s keep it in.”» —“A lesson in budget dust and burn rate” by Cathy Taylor Orange County Register (California) Mar. 12, 1991. (source: Double-Tongued Dictionary)