v. To ejaculate. Literally, when one's testis climb to a "high & tight" position just before launch.
Al was about to nut up when her cell phone rang, turning his hard tool into a soft accessory.
by R2dad August 01, 2006

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Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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To "get high" or alter one's state of mind with drugs or alcohol.
I needs to nut up tonight. I be off tomorrow fo snizzle!
I'm bout to nut up punk.
by tmofft January 23, 2005

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.

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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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to take one for the team, against most odds, to guard closely (in athletic contests) commonly yelled at Ultimate Frisbee games
Yo Bill, nut up and be my wingman tonite

Nut up on that girl, she's been owning you all day
by Texas August 29, 2004

The Urban Dictionary Mug

Lotsa space for your liquids.

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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