Rainn Wilson's preferred synonym for behind.

First mentioned on Late Late Show with Craig Ferguson.
"My thigh caps are so sexy in The Rocker."
"Wow! Look at his fine thigh caps."
by LauraNJ August 24, 2008
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Synonym for butt. Invented August 1-2 at midnight by dwight schrute on the craig ferguson show.
Franklin kicked Mario in the thigh-caps!
by Gohtohmaon August 2, 2008
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