The act of +repping or +rep, is the term used for boosting other peoples reputation on Xbox Live, by submitting good feedback to your friends. Also Plus-rep is used after somebody has just over excelled, they have gained reputation for their actions (+rep).
Guy Number 1: "Omg, I just headshotted three people and roundhouse kicked on to the groin!"
Guy Number 2: "Plus-Rep for that my friend!"
Guy Number 2: "Plus-Rep for that my friend!"
by -=ky=- February 14, 2007