I'm with those who hate YOLO with a fiery passion. I think that's universal though, I've rarely heard it used seriously, generally its used in a mocking or sarcastic way.
"YOLO - Carpe Diem for stupid people!" - can't remember where I got that.
I know Eddie Izzard used "I have to go now, my grandmother's on fire" in his 'Dress to Kill' tour.
As for phrases I hate, "nails on a chalkboard" makes me cringe. I can feel the pain of hearing it every time I read it.
Also, "fiscal cliff", as if it's not something that we sailed over years ago. The cliff is a distant memory.