A euphemism for failing at life.
Person 1: Wow did you hear about that loser that got fired from his job?
Person 2: He totally got gleebled!
Feeling tired and emotionless at the same time, the act of feeling Gleeby Deeby
These are the most silly of cats that also devour human souls, and a ton of cat treats, while also being stupid
My gleeble glorf stole my soul when I slept