could of, should of, would of

A common misspelling of the phrase "could've, should've, would've," used to dismiss one's or someone else's regrets or worries about past actions or the lack thereof. I wish I had given myself an extra day off before going back to work after my vacation. Oh well—could of, should of, would of. A: "Should I have said more during that presentation?" B: "Eh, could of, should of, would of. It's over now, so there's nothing more you can do." A: "Ugh, why didn't I talk to that cute girl at the bar when I had the chance?" B: "Could of, should of, would of—like so many single men before you."