A kinky sex toy, that is inserted in the ass or the vaginal area.
yo chris can I borrow some smart balls I goig to have an erotic night with my girlfriends sister
by yo momma hoeeeeee March 05, 2009

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Top Definition
A sexercise toy inserted into the vagina and in the shape of two balls that stimulates the vaginal muscles and causes the wearer to do her kegels all day. Feels like ticklish/pleasurable and sometimes overwhelming rumbling.
Maria can't walk because she's using her Smartballs and the sensation is too distracting.
by Rory March 28, 2005

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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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The high ball flyer whose background is little known. Sitting in the underworld of his room away from civilization, he still manages to be everywhere and see everything. The Omega baby!
Why don't you go and get some sun? Don't wanna end up like Smartball.
by Smartball August 10, 2004

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.

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.

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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