a burden; a pesoDepending on context, peso can mean a physical or emotional weight, the peso currency, or colloquially a small amount of money. In quitarse un peso de encima, it means to feel relieved; no tener un peso means to have no money.
SP: Después de terminar el examen, se me quitó un peso de encima.
EN: After finishing the exam, I felt a weight lifted off my shoulders.