fool around （尤指一方已婚者）鬼混；乱搞；（常为逗乐）扮傻；胡闹；吊儿郎当；瞎胡混

【例句】
Don't fool around any more; otherwise, you'll pay for it.
别再鬼混了，否则你会为此付出代价。

The workers always fool around when the supervisor steps out.
当管理者离开时这些工人总是在闲耍。