Script (guión): Idioms, ‘don't look a gift horse in the mouth’ which means you should not hesitate too long and miss an opportunity if you're presented with a chance. I was offered a new job last week with a little bit more money and less hours in another company. However, I had a feeling I was about to be promoted in my current job. But my girlfriend said, ‘Look, don't look a gift horse in the mouth. You've got to take this chance while you've got it.’