(slacker, slackest) (about a business) not having many customers; not busy（生意）萧条的，清淡的◆a slack period萧条期◆April is always slack.四月份往往生意不好。◆slack demand for cars对汽车的惨淡需求(about a person) not putting enough care, attention or energy into sth and so not doing it well enough（人）懈怠的◆He's been very slack in his work lately.他最近对工作十分马虎。▸ˈslackly