I think it means, you have tried so hard to please him/her (skinned your knees), and all they do is turn you down - break your heart in other words. (skinned your heart)
Skin can be used as a noun and a verb. Noun: Sally has very pale skin. Verb: The boy skinned his knees when he slid on asphalt.
American cartoonist Tad Dorgan invented many slang terms during the 1920's, including "the cat's pajamas," "the bee's knees," "the flea's eyebrows" - all of which mean "cool" or highly desirable. Dorgan also invented the nonsense phrase "Yes, we have no bananas." See also: Chelsea Hodges.
knees
The Navy's EA-6 aircraft had a crew of four. It was an electronic jamming aircraft. The right rear passenger operated the jamming equipment which contained spinning disks. The equipment was located between his knees. Whenever it stuck he would "boot it" to free the jam.
Biscuits and cheese
Goodbye to you my trusted friend. We've known each other since we're 9 or 10. Together we climbed hills and trees. Learned of love and ABC's, Skinned our hearts, skinned our knees.
on all fours = crawling around on hands and knees.
This phrase suggests that a sense of humility and reverence brings one closer to a higher power or spiritual connection. It implies that being humble and submissive can elevate one's spiritual experience.
The phrase 'the bee's knees', meaning 'the height of excellence' became popular in the US in the 1920s along with 'the cat's whiskers' and 'the cat's pyjamas'. Other possible origins include a corruption of the phrase 'the business'; and 'the b's and e's (from 'the be-all and end-all').
It means exactly what it says. A cricket's ears ARE on its knees.
The phrase "camel knees" does not appear anywhere in the KJV bible.
on one's / its knees, a.in a supplicatory position or manner: I came to him on my knees for the money. b.in a desperate or declining condition: The country's economy is on its knees.
Genibus Nitito Canus is supposed to mean "on your knees, dog." This phrase is only roughly translated because the term "nitito" does not actually exist. The phrase most closely translates to "aging knees."
On your knees before your maker.
Skin can be used as a noun and a verb. Noun: Sally has very pale skin. Verb: The boy skinned his knees when he slid on asphalt.
Surgeons do surgery on hearts, knees, sholders, hips, stomach among other body parts.
This is not the most common slang, but it refers to a large party (commonly outdoors with dancing: hence "knees up")