spoiled rotten

Translations
избалован до безобразия
She was spoiled rotten by her grandparents.
Она была избалована до безобразия своими бабушкой и дедушкой.
Definitions
A phrase used to describe someone, typically a child, who has been excessively pampered or indulged, resulting in a lack of discipline or an overly entitled attitude.
Words
spoil

verb
портить
rotten

adjective
гнилой