An
epiphany of hopelessness. Used when someone strives to conquer life but becomes increasingly doubtful, lost, and unsure.
Eventually, when all hope is lost, "blehhhh" is sighed with distress and
frustration.
person talking:
"Wow! I felt really
productive today. Except, maybe I forgot pay the bills, call my
girlfriend,
feed the cat. Never mind, the cat ate my goldfish. blehhhh."