Bite Your Tongue
Calladito te ves más bonito
To regret about something you have just said, to fight with yourself to no to say something you do really want to.
There are several expressions used to refrain someonés intentions to say ir do something, such as: Hold your horses or hold your tongue. Now, imagine that you want to say something while pressing your tongue between your teeth . It´s difficult, isn´t it? Well, this is why people command others to keep quiet by saying, “Bite your tongue!”
Example:•I saw my best friend´s girlfriend in a party kissing another guy. When she noticed I was there, she challenged me to tell my friend, arguing that he would never believe me and that it would jeopardize our friendship. Then, anytime they come together, she just gives me a sarcastic smile, while I keep telling myself, “Bite your tongue! Don´t say anything at all! He is so much in love with her.”