to foul one's (own) nest
01
to behave in a way that damages or undermines one's own reputation or success
![to [foul] {one's} (own|) nest definition and meaning](https://cdn.langeek.co/photo/40867/original/?type=jpeg "to [foul] {one's} (own|) nest definition and meaning")
Disapproving
Idiom
例
By treating his employees poorly, the manager has fouled his own nest by creating an unhappy and unproductive workplace.
