sleep on life
Let life go by or pass on by
"You haven't heard this song? Everybody know this song, bro you sleep on life."
Sleep life
When you do something in your dreams, for example, like start crying and you wake up actually crying. It's basically an event in which your dreams really do come true.
Man I swear my sleep life is happening more often then my real life. I was using the restroom in my dream and I woke up with piss in my sheets... It was embarrassing.