get by
To be able to go past; pass.
The cars moved to the curb so that the fire engine could get by.
To satisfy the need or demand.
Mary can get by with her old coat this winter.
The janitor does just enough work to get by.
Not to be caught and scolded or punished.
The soldier thought he could get by with his dirty rifle.
The boy got by without answering the teacher's question because a visitor came in.