Green’s Dictionary of Slang

1. to ruin.

2000

H. Dowd ‘Crazy Summer’ 🌐 That plan was immediately sewered when I came home and mom told me that Aunt Elaine had asked if my sister Cindy and I could go up to her place to help out over the summer.

2. (US police) to throw down the sewer or otherwise dispose of—used of drugs the police have seized but do not want to hold as evidence.

2005

R. Cea No Lights, No Sirens 229: Rob, I just tossed someone. I ain’t sewered it yet. Give it to the little boon and let’s do our work.