Top Definition
A method of navigation superior to GPS, which utilizes the measurement of relative air-current temperature. The method involves the application of saliva to a male’s scrotum by a female’s tongue. The scrotum is then placed outside the window of a moving vehicle. Air currents are analyzed via temperature changes detected in the epidermal layer of the scrotum. A normal vector corresponding to the isothermal region with the lowest relative scrotal temperature is deemed the “sacknav” vector. The sacknav vector always points parallel to the direction of final destination, via the path of least resistance.
Orion used sacknav to successfully navigate the roads of Vancouver.
by matricks April 26, 2009

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In-built biological navigation system used by the male of the species to find a mate. Generally initiated by combining a state of over-laden plums with a large intake of alcohol.
'Peter's going round the dancefloor like a dog with two dicks. Yeah, he must have switched on the Sack Nav'
by gavos October 26, 2008

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One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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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