What is Back Caps?
1.
the back side of your knee, or back side of your knee cap. due to its difficult-to-reach location it tends to sunburn often and remain hairy after the rest of the leg has been shaved.
ann: oh my gosh jan, your back caps are so red!
jan: i know! when i put sunscreen on i missed that part and now my back caps hurt like a bitch whenever i sit down.
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