"to strike sharply," 1719, probably of imitative origin. The noun is from 1737. The word in out of whack (1885) is perhaps the slang meaning "share, just portion" (1785), which may be from the notion of the blow that divides, or the rap of the auctioneer's hammer. To have (or take) a whack at something "make an attempt" is from 1891. Related: Whacked; whacking. Whacked out is from 1969.
双语例句
1. He gave the donkey a whack across the back with his stick.
他拿棍子朝驴背上狠狠打了一下。
来自柯林斯例句
2. The majority of people in this country pay their whack.