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2.
Noun. Rear viewage, Including, Hoo Hoo and Bootay.
If you bend over too far your backage will show.
by That Gurl 7 August 04, 2006
 
1.
Back•age ( bak~ajh )

~noun

the act of rubbing, kneeding a persons (or animal!!) back, as to stimulate circulation, loosen, and relaxify.
Baby, come here your all tense , let me give you a backage , make it better!
by Teegan0151 February 15, 2010
 
3.
The act of backing ones-self in a competitive situation, with the confidence that you will succeed - i.e. there is no such thing as a 50/50 ball. It's always yours.
I really admire Jonny Wilkinson's backage in the contact, he really backs himself to tackle anyone that comes near him.

or alternatively;

Newcastle backed themselves to bounce back and score after the break, having fallen behind in the first half.
by gavorama February 24, 2011