Idioms: biting

Here are three idioms about biting. ^_^

Bite one's tongue means to say nothing; not react. You are stopping yourself from saying something angry or upset.

I was so angry at him, but I bit my tongue. (=I didn't say anything.)

As the customer continued complaining, the waitress had to bite her tongue.

Bite one's head off means to say something very angry without a good reason. This is common when a person is stressed.

I only asked her if she wanted a cup of tea, and she bit my head off. (=She said something very angry to me.)

'Okay, okay! You don't have to bite my head off.' (=Don't get so upset at me.)

Bite the bullet means to do something you are afraid of, or something unpleasant or unfamiliar.

My teeth hurt, so I have to bite the bullet and go to the dentist.

At first she was too nervous to ask questions in class. Finally she bit the bullet and raised her hand.

So, how about you? When do you have to bite your tongue? When was the last time you bit someone's head off? When was the last time you bit the bullet, and did something you didn't want to do?