from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A deceitful trick; an underhanded act.
- n. Remarks intended to deceive; deceit. Often used in the plural.
- n. A playful or mischievous act; a prank.
- n. Mischief; prankishness. Often used in the plural.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Trickery, games; skulduggery. To "call", "claim" or "declare" shenanigans is to rhetorically label something as officially deceitful, improper, or otherwise incorrect.
- n. A deceitful confidence trick, or mischief causing discomfort or annoyance.
- n. Mischievous play, especially by children.
from The Century Dictionary and Cyclopedia
- n. Nonsense; humbug; deceit: as, now, no shenanigan about this.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. reckless or malicious behavior that causes discomfort or annoyance in others
- n. the use of tricks to deceive someone (usually to extract money from them)
Origin unknown.(American Heritage® Dictionary of the English Language, Fourth Edition)
Of uncertain origin. These possibilities have been suggested: (Wiktionary)