A hacker in the 1990's who was considered a "White Hat". He found and patched many exploited systems for many system admins.

The term syren is always interchangable with the word hacker.
I'm glad he was a good syren and not a bad syren.
by syren May 07, 2005

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Top Definition
A beautiful mermaid baby with magical powers.
What a cute little Syren.
by momma mermaid November 19, 2014

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