I'm fairly certain that YOLO is just Carpe Diem for stupid people.

All I want, oh dear friend of mine, is for you to go out with someone. Do something, even if it's not the magical, wonderful thing you had in mind. Don't sit around for one more second pining away for some fantasy that might never come along, because it might not even exist.

You live but once; you might as well be amusing.

I totally carpe-d the snot out of this diem!

Time will always exist but you will not. Stop your mind from drifting off into the future if you aren't there yet. Cherish the seconds of your life, live now not tomorrow. -Enlightened-

Well, it does make you realize that life, even at its longest, is still very short.