Just an awkward arm with nowhere to go. It normally comes into play during spooning, when you are the big spoon. When you spoon, you're on one side, laying on one arm. The top arm is usually wrapped around your partner. The other arm is squished and uncomfy.
Things to do with your awkward arm:
1.) Massage your partner
2.) Stick under them. and wrap around
3.) Grab his/her butt
4.) Guys: Cover your boner!!
*To your little spoon:
One sec, I have to move my awkward arm.