Top Definition
An acronym for Shit I Don't Need, aka junk or useless stuff. Pronounced SID-din. Usually used for boating toys and extra things no one will ever really need.
"Hey man, did you buy some SIDN yesterday?"
"Yeah dude! I know I don't need it, but it's fun shit!"
"What'd you buy?!"
"An anchor loop, three water chairs, coasters with extra grip, the third season DVD of Big Bang Theory, and a cookbook for potatoes!"
"Dude that's some serious SIDN!"
by lawlzop September 03, 2011

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

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