A ball of dried shit tangled up in your ass hairs. Similar to dingleberry but a little nastier to say.
I would've ass-fucked her, but I saw a shagnasty and flipped her over instead.
by B-Man September 28, 2003

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The state of being horriable, worse then nasty
dude that is one shagnasty gash on your knee
by magicalfuller September 22, 2006

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Freakin' awesome. Anything that is deserving of a title stronger than 'cool' and in a positive sense.
"That new shirt is shagnasty, bro"
"Yo, Mr. Holland is the shagnasticator for shizzle!"
by Tmoney February 16, 2005

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something that is really good
Man that weed is totally shagnasty!
by irvinesucks September 23, 2007

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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derrty or someone who gets lots of action
that jenna jameson's real shagnasty
by vanila waffa aka da rock February 16, 2005

The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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Like choad and taint, this word describes the wonderland between a person's genitalia and a-hole. "Shag," because it's hairy, and "nasty," because, well, look at it!
My shagnasty is itchy again. Can I borrow your fork?
by Just Joe September 07, 2003

The Urban Dictionary Mug

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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).

Buy the t-shirt