When someone compliments an unattractive individual to make that individual feel better about themselves (actually meant to boost their self esteem) but it’s actually not true; the individual then mistakenly takes it seriously from there on out and has an inflated ego.
Example: Sarah thinks she’s hot shit since she got those breast and butt implants but she’s actually a “compliment gone wrong”.
Dave sure has been acting like a “compliment gone wrong” ever since he got those new hair plugs.