Top Definition
Noun. Someone who performs exceedingly well at the beginning of a course, but fails to continue to do well.

Verb. To do very well at the beginning of a class, but do poorly later on.
Dude, Mike totally aced that first exam, but then nirbed out on the final.

Yeah man, Mike is such a nirb.
by The Nirbster November 27, 2012

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The Urban Dictionary T-Shirt

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a really hot short girl
That new girl is such a nirb.
by ldksjbf September 05, 2007

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