It's possible, But for that, such adult must be disabled before age 22 and to have a deceased parent or such parent starts receiving retirement or disability benefits. It is considered a child's benefit because is paid on a parent Social Security record.
Oh, that's interesting. Look, about that disability, what can you tell me if  i'm not able to do my current work anymore?
Are you currently unable to perform any work?
No, nothing like that, just being curious about it.