keep end up
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keep (one's) end up
To do as was promised in an agreement or bargain; to carry through with what one agreed to do. OK, I've delivered the cash as you instructed. Now you have to keep your end up! My dad said he'd buy me a car if I got a 4.0 this semester, so I've got to ace this test if I want to keep my end up.
keep one's end up
1. Lit. to hold one's end of a load so that the load is level. Be sure to keep your end up while we go up the stairs. Try to keep up your end.
2. . Fig. to carry through on one's part of a bargain. You have to keep your end up like the rest of us. Don't worry, I'll keep up my end.