[FizzyWater]

One I hear alot is "he did his best". Generally, the context is in something having not gone well (maybe a little, maybe a lot).

I don't know anyone who does their best all the time. We do what we do. (That phrase might annoy people as much as "it is what it is"). It can't be changed. If we were stupid (or lazy or rude or whatever), we can only hope we'll learn from it.