To support something.
I am backing the new Muse album.
by Nyroh April 09, 2005
Can you define these popular missing words?
When you need to go somewhere for whatever reason, and you don't want to be there on your own, so you get a few (or one) of your friends to come with you so it looks like you have friends.
Hey man, I need to go to the bowling alley, can you be my backing?
by Thegreatnick July 25, 2006