hit the horn 按喇叭。horn n. 喇叭；触角；角质；号。v. 强行介入。
draw in one's horns 减少,收敛。

【例句】
People get tired of a man who is always blowing his own horn.
人们对老是吹牛的人感到厌烦。

I was on the horns of a dilemma when I was offered another job.
人家又给了我一个工作，我不由得进退两难。