(one's) patience is wearing thin
One is becoming annoyed, exasperated, or angered (by someone or something); one's patience is diminishing. Please try to behave, kids. My patience is wearing thin. Mom always gets this frowny look on her face when her patience is wearing thin. Are you serious—that shipment still hasn't come in? Ugh, the boss's patience is wearing thin.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.