from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Slang Crazy or senseless activity or behavior; craziness.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (Yiddish) craziness; senseless behavior or activity
Yiddish meshegas, from Hebrew məšuggā'; see meshuga.(American Heritage® Dictionary of the English Language, Fourth Edition)