If someone offers you a shouder to cry on or is a shoulder to cry on, they listen sympathetically as you talk about your troubles.

For example:

If you need a shoulder to cry on, I have two.

Mrs. Barrantes longs to be at her daughter’s side to offer her a shoulder to cry on. 

Roland sometimes saw me as a shoulder to cry on.

So, sometimes, more than information, tips, or advice, I just give them a shoulder to cry on.

He and Kate had a row. I think he’s just looking for a shoulder to cry on.

Tradução: um ombro amigo para chorar.