mosca muerta

Spanish

Noun

mosca muerta f (plural moscas muertas)

1. Used other than figuratively or idiomatically: see mosca,‎ muerta.
2. (idiomatic) two-faced cow, two-faced bitch
3. (in phrase hacerse la mosquita muerta) to look like butter wouldn't melt in someone's mouth

See also

• un lobo con piel de cordero

Further reading

• “mosca muerta”, in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014