Horse (caballo ) you will know. The expression “hold your horses” is an imperative (imperativa) expression.
It means to stop or slow down. Its origin comes from Homer´s “Iliad”, where the writer refers to someone who is driving his chariot (carruaje) like a maniac (maníaco).
Here are some expressions.
Hold your horses (para el carro)! Do not make a hasty decisión (…decisión apresurada).
Hold your horses, Leila. You are jumping to conclusions … (sacando conclusiones precipitadas).
There are other expressions with horses. Click here to read “Horses for courses”.