a large vehicle, usually in the form of a bus or large van, filled with people with little brains, little age, or little drivers license and car.
look at all those poor people waiting for the lump lump! Too bad they don't have a car. :(

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Top Definition
Pertaining to, speaking of, or just downright calling someone retarded or a retard. Originating and somehow managing not to venture outside of the boundaries of the Athens-Clarke County Public School System in Athens, GA, lump lump has been used for generations of students when describing special needs kids, short buses, and teachers who can't teach for shit.
Damn, there goes the lump lump bus. I hope they don't start throwing poo at us.
by Doonshton September 06, 2006

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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