[倾盆大雨 / 傾盆大雨, qīng pén dà yǔ, ㄑㄧㄥ ㄆㄣˊ ㄉㄚˋ ㄩˇ]a downpour; rain bucketing down; fig. to be overwhelmed (with work or things to study)#49214[Add to Longdo]
[雷大雨小, léi dà yǔ xiǎo, ㄌㄟˊ ㄉㄚˋ ㄩˇ ㄒㄧㄠˇ]lit. much thunder but little rain; fig. a lot of talk but little action; his bark is worse than his bite[Add to Longdo]