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1.
A context babe is a person who's attractiveness depends entirely on the context in which you know them, and would not normally be attractive outside of said contextual situation. A person who you would not look at twice when crossing paths on the sidewalk, but makes you hot and bothered when you see them playing guitar with their band.

Also penises.
He's such a context babe. I wasn't attracted to him at all until I found out he was a Doctor Who extra.
by Timmering May 05, 2013