swagger about meaning in English

吹牛, 昂首阔步

Let my nephew and goldthred swagger about their wager as they like .
让我外甥和戈德斯雷德去信口开河地打赌，随他们的便吧。
“ at 1 - 0 down that certainly would have been the case but we kept playing , we played some great football and there was a real confidence and swagger about us at times
0落后时当然有些令人沮丧但我们坚持不懈，我们踢出了伟大的足球，间或我们确实感到信心十足并能昂首阔步。