表达 “go way back with someone” 的意思是 “与某人是老相识”。它和 “know each other for a long time” 的意思相同，都可以描述两个人认识的时间很长，且有共同的经历。
Tim and I go way back – we met at primary school.
My dad and Roger go way back. They’ve been friends since university and still see each other every few weeks even after all these years.
Laura said she knows someone who can help us with this new piece of work. Apparently, they go way back and have worked together many times before.