Idiom
lean on someonelean on (someone/something)
1.
to depend on someone or something.
The children leaned on each other for help and comfort.Verplank leaned on his experience as a waiter to figure out how to behave when he met the prince.
2.
to put pressure on someone or something to get what you want.
The Spanish teacher had to lean on the school principal to get new textbooks for the class.