2. Subconsciously expending the allotted snoozes for a set alarm and waking up roughly an or so hour later; upon waking up, the first glance of the time will set off the person to express his anger with the exclamation of a single word whilst blaming the alarm clock.
3. The scapegoat for an unset alarm.
Buddy: "Why are you so late?"
Student: "My damn alarm didn't ring."
Buddy: "You must have ghost snoozed."
Student: "NO! ... *sigh* ... probably."
*An alarm clock was not set the night before and Jamie wakes up an hour late*
Jamie: *Looks at the time..* "F@CK! ... Must have ghost snoozed."