('informal') She lost the tickets? How 'classic'. [=it is not surprising that she lost the tickets; she often loses things]
Their latest album is 'destined to become a classic'. [=it is very good and will still be admired many years from now]
a radio station that plays 'classic' rock [=rock music from the past that is still popular]
(..) Sweet dreams. Let's try the hat again. - Not bad. - No. No. He looks like a chimney sweeper. He can't be dressed too classic. - What did I just say? - Ok, so it's too classic. Forget the hat. Regular or fancy? There's something. (..)2011 The Intouchables
(..) - Well, yeah! - A joke... - A good one, right? Really funny. Really funny joke. It's a classic. "No feet? no sweets." But with you... Come on. - It's so good! - Good joke. (..)2011 The Intouchables