your own worst enemy


Also found in: Acronyms.

(one's) own worst enemy

Causing complications to one's life and/or keeping oneself from success; self-destructive or self-sabotaging. Tommy's becoming his own worst enemy, with the way he's been skipping school lately. She always sabotages a relationship when it's going really well because she's her own worst enemy.
See also: enemy, own, worst

your own worst enemy

COMMON If you say that someone is their own worst enemy, you mean that their own behaviour causes most of their problems. In a way I'm my own worst enemy — too critical and hard on myself. The patients are their own worst enemy. They keep missing appointments.
See also: enemy, own, worst