It'll be a cold day in July when our team wins the championship. We're terrible.
(a cold day in July means it's never going to happen)
（a cold day in July指绝不可能发生的）
It's been raining cats and dogs all day. I'm afraid the roof is going to leak.
(raining cats and dogs means rain heavily)
（raining cats and dogs指倾盆大雨）
Jeff smokes like a chimney. I worry about his health.
(smokes like a chimney means smoke a lot)
（smokes like a chimney 指抽烟很多的）
Jim is a straight arrow.
(a straight arrow means an honest trustworthy person)
（a straight arrow指诚实可靠的人）
Kevin says he was completely in the dark about the CEO's plans to sell the company.
(in the dark means unaware)
（in the dark指不知晓）