"Irreparable Damage"

Viewers with alarm sometimes use the phrase "[x] caused irreparable damage to [y]."

Sometimes that's true, sometimes it's all water over the dam, or water under the bridge.

I'm sure my relatives and teachers in childhood caused irreparable damage to my prospects of every becoming President.  I merely have to point to the fact that I've never become President and my chances of becoming President are now slightly smaller than the chances of both the Washington Nationals and the Washington Redskins making their playoffs.

My point: "irreparable damage" may often be quite correct, but it is not synonymous with "major damage."