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1.
Ridin' tan is an all-over fake tan one applies if one thinks they are going to 'get the ride'.

Nothing worse than when a guy sees a girl with tanned arms and legs and then when he undresses her he sees white tits and a white arse.
Aw me God! If Mick's goin' to be dere I'll have put on ridin' tan before I go out - will yih give me a hand with it?
by Sharynda November 09, 2010