When one person opens their legs, and sits on someones thigh, and proceeds to dry hump said thigh until climax or as a form of foreplay.
David Beckham's thighs are so huge! Perfect for thigh riding.
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The action of grinding against someone's thigh for sexual pleasure. May be clothed or bare
Lily: damn, have you seen Jimin's thighs lately?
Bella: yes oh my god, they look so good for some thigh riding!
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