run thin
1. To diminish or lessen; to begin to run out. Please try to behave. My patience is beginning to run thin. Supplies are really running thin, sir. When is the chopper going to get here with more?
2. To weaken or become less effective. It was cute the first few times that he did it, but his little routine has run thin.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.