Top Definition
The act of performing cunnilingus on a girl by pulling the female's vaginal lips apart, then shaking your head violently and fully relaxing your cheeks and lips. Also, a sound effect like you are really going to town and getting dirty with this girl's vagina is welcome, and is almost 100% necessary for the woman's full satisfaction. Any saliva that falls out of your mouth while doing so is just added lubrication. Based from the character Boss Nass in Star Wars.
Dude, I just boss nassed that girl last night! She came within five seconds!
by athletics7375 August 15, 2011

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ANYTHING THATS BITCHIN; for instance: jawn fused with bitchin
Look at that BOSSNASS
by BOSSNASS November 05, 2011

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Lotsa space for your liquids.

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Lotsa space for your liquids.

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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