Top Definition
1. A person, thing, or situation which possesses characteristics of utter randomness and unpredictability; something undefined.

2. Any person or object, particularly a strange one, that’s name is not known by the one referring to it; like a "whatchya-call-it" or "thing-a-ma-bob."
1. -My hoopajoo of a car is really starting to bug me.
-We've gotten our selves into a real hoopajoo here.

2. -That… hoopajoo over there; could you grab it for me?
-Who’s that hoopajoo standing over there in the frilly getup.
by Brian Hindt May 23, 2005

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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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).

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Anything vague and potentially uncomfortable, often inserted into an orifice.
You were abducted by aliens? Did they stick a big metal hoopajoo up your ass?
by superoog October 19, 2004

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

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

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

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