Note that I did not make these up. I found them on a certain forum I go to and that person didn't figure it out themselves, either.
DORMITORY: When you rearrange the letters: DIRTY ROOM
ASTRONOMER: When you rearrange the letters: MOON STARER
THE EYES: When you rearrange the letters: THEY SEE
THE MORSE CODE: When you rearrange the letters: HERE COME DOTS
SLOT MACHINES: When you rearrange the letters: CASH LOST IN ME
ELECTION RESULTS: When you rearrange the letters: LIES, LET'S RECOUNT
SNOOZE ALARMS: When you rearrange the letters: ALAS! NO MORE Z 'S
A DECIMAL POINT: When you rearrange the letters: IM A DOT IN PLACE
THE EARTHQUAKES: When you rearrange the letters: THAT QUEER SHAKE
ELEVEN PLUS TWO: When you rearrange the letters: TWELVE PLUS ONE
I took out some of the ones most people probably wouldn't get.