It’s been a while since I’ve submitted a word definition to Urban Dictionary. I’m digging way back to a word I learned as a child, skelbow. Ten years ago, I was shocked to find out that nobody else has heard of this word. I swear I learned skelow as a child. Even my twin brother does not recall this word.
I shall make this word be known to the world! Urban Dictionary better accept my definition!
definition: The inside part of your arm, where it bends. Sweat likes to build up in this area when you keep your arms crossed for too long. Blood is often drawn from this popular part of the arm.
examples: “My skelbow is totally bruised up from giving blood.”
“When crossing your arms, the skelbows make the perfect cradle for your hands.”
“The cold cold stethoscope on my skelbow makes me shriek like a baby.”
keywords: elbow, arm, body part, antecubital space
UPDATE January 5, 2016:
Urban Dictionary has rejected the word skelbow.

I will be so excited for the day when someone tells me they know the word skelbow!
Maybe you should preface your definition with “The skin (on the inside part … ), since I’m assuming the “sk” is for skin.
Also, my youngest daughter refers to that space as her “germ pocket,” a term she learned in school to define the place you sneeze into instead of your hands or on the back of a classmate’s neck. I’m going to suggest she use “skelbow” instead, as in “Hey! Keep your nasty germs away from me and sneeze into your skelbow!”
Germ pocket! That’s brilliant! Also, I never realized that the “sk” part of skelbow would refer to skin, but that makes total sense.
And yes, please do continue the spread of the word skelbow, through the prevention of the spread of germs.
There must have been some heavy deep debates in the offices of Urban Dictionary over this word, because it took them over two months to decide to reject it.