Be on somebody’s back
verb
To constantly criticize, nag or complain to someone.
My mother is always on my back about my grades.

Often appears as...
- parents are on back
- teacher is on back
Usage tips
Informal, Disapproving
Colloquial
verb
To persistently urge someone to do something.
The coach is always on his players' backs to train harder.

Often appears as...
- manager is on back
- coach is on back
Usage tips
Idiomatic
verb
To constantly criticize, nag or complain to someone.
My mother is always on my back about my grades.

Often appears as...
- parents are on back
- teacher is on back
Usage tips
Informal, Disapproving
Colloquial
verb
To persistently urge someone to do something.
The coach is always on his players' backs to train harder.

Often appears as...
- manager is on back
- coach is on back
Usage tips
Idiomatic
Definition 1 of 2

Negative Connotation
This phrase often implies annoyance and a lack of patience from the person complaining or nagging.

Stop being on my back about cleaning my room! I'll do it later.
Colloquial Expression
Primarily used in casual speech among friends or family, not in formal situations.

She's always on my back to quit smoking, but I appreciate her concern.
Emotional Weight
The phrase can express the speaker's feelings of being controlled or overwhelmed.

My brother is always on my back about borrowing his things without asking.
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