Smackeroony

Part of speech: noun

Definitions

1. Informal slang for a single dollar, especially a one-dollar bill in American speech
2. A casual American slang term meaning one dollar, used in everyday talk about money
3. Playful colloquial name for a dollar note, typically one unit of United States currency

Etymology: Smackeroony is slang for a dollar, and the word's own shape tells most of its story. It is built from "smackers", an American slang term for money, with "-oon" added in the sense of a coin or sum, and the diminutive ending "-y" tacked on at the end. Stack those three pieces together and you get a playful, slightly comic nickname for cash, the sort of word that sounds like it was made up on the spot to make a dollar sound smaller and friendlier than it is. The singular form is rarely used on its own. Speakers almost always say "smackeroonies" in the plural, and the singular exists mainly as the back-formed counterpart to that plural. This is a common pattern in slang, where the plural becomes the familiar everyday form and the singular is derived from it afterward.