dī​néng'ér

idiot

低能儿 (低能兒) dī​néng'ér
idiot noun
a person who is extremely stupid or incompetent (often used as a derogatory insult)

He actually fell for that scam; he's a complete idiot.

retarded child noun
a child with significantly below-average intellectual functioning or intellectual disabilities

Caring for children with intellectual disabilities requires extra patience and love from parents.

Frequency

Movie subtitles
1.73 per million appears in 1% of films
Written text
0.124 per million

Sources

Definitions
CC-CEDICT