A: Have you made your decision? But it's really dangerous.
B: Whatever you say, I won't chicken out on things. I'm determined to do.
A: Stop talking big. You can't fool me. I'm afraid you don't know how to do it at all.
B: Well, believe it or not, I'll show you what I can do.
e.g. The band couldn't perform because the singer chickened out backstage.
e.g. Jim was going to skydive, but chickened out when he got on the plane.
e.g. They feared that their allies would chicken out on the plan at the last moment.
1. make a (one's) decision：做决定
e.g. Judge John Bates said he would make his decision as soon as possible.
e.g. If you make this decision you will certainly have the President at your back.
2. talk big：吹牛，说大话
e.g. You can't believe more than half of what he says, he always likes to talk big.
e.g. He likes to talk big as though he was an important person.
3. be determined to do：决定做某事
e.g. He is determined to seek for a building more suited to their needs.
e.g. Characteristically, he was determined to act without clearly knowing what to do.
e.g. He was determined to mend his ways and turn over new leaf.