Top Definition
An activity that would occur under the influence of a mind-altering substance.
Roberto: Dude, what HIGHTIVITY are we gonna be doing after smoking some of this fire Sour Diesel Kush?

Alexander: I don't know yet man, I'm coming up with some highdeas.
by Muffinsito December 06, 2010

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).

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