干打雷

Traditional (Taiwan): 幹打雷

gāndǎléi ㄍㄢ ㄉㄚˇ ㄌㄟˊ

    • all noise and no action
    • to make a lot of threats without following through

Character by character

Other words read gāndǎléi

gandalei with other tones

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
thunder without rain
Meaning
Short for 干打雷,不下雨: all noise, no action.

Sources