Top Definition
The tanning of the underside of the nose, as usually achieved through artificial means such as a spray from a tanning salon. An up tan implies that one would have to be upside down in the sun in order to tan that part of the body, and is therefore a giveaway that the tan is artificial.
She must have gone to a salon, check out her up tan.
by therealvapornumber1 May 22, 2009
5 Words related to up tan

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