horse around意思是和别人开玩笑、闹着玩儿；
straight from the horse's mouth
1.听马说的(根据最可靠的消息来源)
2.可靠地
3.来自权威和可靠的消息；
get off her high horse
放下架子,不再盛气凌人；
wild horses could not drag her away
野马都拉不走我（说明这个“我”相当倔强） ...用中文的话来说就是 八台大轿也抬不动我；
you can lead a horse to water ,but you cannot make him drink
牵马到河易,逼马饮水难.