Pubic hair that is untrimmed and so long that it hangs down one's leg similar to side burns. Similarly the chafing from such long hair literally causes friction burns on the thighs.
Noun - The androgenic hair that grows on the upper thighs of post-pubescent humans (yes boys and girls, or men and women more appropriately - we've all got it, to a lesser or greater extent) that can look like it has 'escaped' from the pubic area.
a slang, hair line recession term which indicates the loss of hair starting at the edges of the forehead. it is (jokingly) blamed on friction occurring from the shaking thighs of ones lover while performing amazing oral sex on them.
Patrick's thigh burns told her all she needed to know about his oral sex skills.