The expression "has left the building" used to be reserved for discouraging fans of Elvis and Marylin not to hang around for autographs, a glimpse, or a chat with their hero, thereby informing them that their hero no longer occupies the premises and has 'physically' left the building prolly in a limo ... but now generically refers to virtually anybody and anything that has 'permanently' expired, as in dead, died, death, "passed away", checked-out, dirt napped, and can no longer pay taxes and entertain the 'troops' ... but like Frank says "that's life, that's what people say, you're riding high in April, shot down in May, but I know one thing, I've been a Puppet, a Pauper, a Poet, a King, I've been up and down, and over and out, and I know one thing, EACH-TIME, I-FIND, MY-SELF, FLAT-ON-MY-FACE, I pick myself up and get back in the race ... That's LIFE! ... -bdn-
"What do you mean she's not here?"
"Like she has left the building, man!"
"I'm Sorry, dude, but your mama's dead."