In some Latin American countries, 'monga' is a slang term that refers to a person who is silly or acts in a goofy way. It can also be used to refer to someone who is lacking intelligence. It is often used affectionately among friends and not necessarily as an insult.
Examples
- Spanish: ¡Deja de actuar como una monga y toma esto en serio!
- English: Stop acting like a silly goose and take this seriously!