go way back

1. verbTo extend a long way into the past. This issue is hardly new. It goes way back to when the company was first founded. If this corruption goes way back, we're finished as a business. A silent movie? Well, this must go way back then.

2. expression Said when one has known someone for a very long time. Oh, Caitlin and I go way back—we've been friends since kindergarten, in fact! Who said that Rosemary and I go way back? No, I've only known her for about a year. Oh sure, George and I go way back. I've known him since we were kids!