Top Definition
Shit In, Shit Out: If you're putting shit data into an experiment, you're going to get shit data out.
Your results are bubkes, what did you expect? SISO!
by Mike Schroll March 13, 2010

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a retard or to be retarded. Its name originates from a school called Sisobel for mentally challenged people.
1. George is being siso. (George is being retarded)
2. George is a siso. (George is a retard)
by Jimmy Cracked Corn April 11, 2008

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The Urban Dictionary T-Shirt

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Siso stands for "spicy in, spicy out". A phrase to help us remember that although spicy things taste good, they may also burn the hell out of your a-hole on the way out.
Person 1: What kind of wings should we get? Inferno?

Person 2: Siso, bro. You don't want an ass like a Japanese flag, do you?

Person 1: Good point, let's get teriyaki.
by juicien June 12, 2011

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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

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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Shit in, Shit out.

Making good products bad by putting shit ingredients in to make it cheaper to make.
SiSo, You get what you pay for.
by drwafu August 18, 2016

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.

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