from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Slang A dollar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One dollar.
from The Century Dictionary and Cyclopedia
- n. A dollar.
Origin unknown.(American Heritage® Dictionary of the English Language, Fourth Edition)
Most commonly accepted theory: late 19th century macaronic blend of simon ("dollar"), from simon ("sixpence coin") (17th-century British slang), and Napoleon ("French gold coin worth 20 francs, bearing the image of Napoleon III"). Perhaps from New Orleans. Also see simony. (Wiktionary)