Similar to "shake that bear," it means to engage in some sort of sexual activity that is up to the listener's and speaker's interpretation.

To say you "nabbed that biscuit" implies that you got what you were looking for, e.g. pussy.

It can also be used as a powerful statement of encouragement equivalent to "man up" or "get it, get it."
Guy 1: Yo bro, what'd you and that slampiece end up doing last night?
Guy 2: Boy you know I nabbed that biscuit.

or

Guy 1: Stop being such a fucking pillowbiter and nab that biscuit!
by Cubonebone February 4, 2010
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An exclamation or interjection used to excuse theft or grabbing. It must be said before the object is taken. To avoid having one's possessions Nab Citied, one must declare that they are un-Nab Citiable.
Guy 1: "I just got a ticket to the chocolate factory! I can't wait to go!"

Guy 2: "Nab City! That ticket is mine!"

Guy 1: "Nooo!"
by lemondrop10 September 16, 2010
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When you charge a ridiculous amount for gas money
Keegan charged me $30 just to drive me to the mall, he was gas-nabbing me!
by Bottles_The_Destroyer January 5, 2015
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A nickname for a friend named Nabila who will go to a restaurant and order the largest meal on the menu and then only eat 10%
Went out for breakfast the other day, the girl I was with was such a 10% Nabs
by Tarryn W May 7, 2013
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Feb. 11= nab
ksm211=nab
Afeztz is a nab for using the sn ksm211 and having a nab birthday such as Feb 11.
by OutKastz December 17, 2004
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A hacker's attempt to steal personal account information by replacing the site information on an inactive browser tab with identical images that link instead to the hacker's site. The user is requested to re-log in to the site that was opened in a tab they left open in their browser while visiting other sites, such as email, PayPal, social networks or a bank, and when the user supplies their password to re-log in, their login information is sent to the hacker.
Hey man! Don't do it. Check the site URL or just close the tab and start over, to make sure no one is tab nabbing you.
by mavenflo July 21, 2010
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a word used comonly by red necks, and huge guys you have no anger in them..
Dang nab it theres a nail stuck in my forhead DANG!!!
by ayrton October 8, 2005
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