Grief over the loss of something that only existed in dreams or fantasy.
Larkin awoke and felt the sudden pangs of dream grief. Not only had her husband left her for his manicurist, but her brownie nut fudge sundae vanished before she could take the first bite.
Greyland made a decent living but true riches eluded him. He watched his wealthy friends with envy, and his contentment in life was waylaid by dream grief.