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To take a situation or object and make it better. The phrase comes from adding sauce to otherwise unsavory food stuffs.n
1.Tyler: "these turkey tenders taste disgusting!'

Cassie: "just sauce it up"

2. Cody: "Ugh, I really don't want to go to summer school."

Kait: "Sauce it up!"
by Binomial Biscuit June 19, 2011