Top Definition
Good sounding bad idea- a notion that seems great on the surface, but when put into action is actually bad.
At the time, who knew that communism was just another GSBI?
by REBECCCCAAAA October 13, 2005

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Good Sex, Bad Idea

Self explanitory...leads to disease, pregnancy, and unwanted phone calls
When Bruce awoke and looked at Geoff, he realized he had fallen for GSBI.
by Joe Hasbeen October 13, 2005

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acronym: Good Sounding Bad Idea. An idea that sounds exciting or plausable, but upon further thought or execution is revealed to be astoundingly dumb and/or dangerous.
1 - Brian suggested all 20 of us go to the party, when only he was actually invited.
2 - Cat decided to ride her bike to school as exercise, disregarding the fact it was 10+ miles away and she needed to be there in 30 minutes.
by skyywise May 26, 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.

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