Head smashing was also present enough in episode 5x09 to give us reason to believe Negan is around. When Noah found his old house, he found his mother with her head smashed in the living room. Very similar to what Negan did to Glenn.
A trade-off is a situation where you make a compromise between two things, or where you exchange all or part of one thing for another. ...the trade-off between inflation and unemployment. American English: trade-off
A seller supplying both trade or resellers, and the general public will have a general list price for anybody, and will offer a trade discount to bona-fide trade customers. Trade-in credit Trade-in credit, also called trade-up credit, is a discount or credit granted for the return of something.