A word used when one person claims he/she will do/say something and you think they won't.The penalty for not doing what they said they would (when a shananagains is called ) results in them being hit in the balls / boobs by the shananagee , ( person who calls shananagains ).
person 1:I swear im going to kill him someday.
person 2:shananagains!
by kyle c smith May 18, 2008

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Top Definition
To joke on someone, to pull a fast one; to be mischevious and devious in intent and nature; to fool someone or lead them on thinking one thing, only to have them unpleasantly surprised about the true result
Guy puts in work all night for this girl at a party. As they go upstairs and get ready to have sex, the girl passes out before anything happens. The guy's response, SHANANAGAINS.
by pbpimpn4life25 May 16, 2007

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt