雷声大雨点小

雷声大雨点小

Literally means:

loud thunder but small raindrops

Actually means:

much said but little done

It thunders very loudly, but does not rain as much It metaphorically means something is much said boasted but poorly performed. It is usually used to ridicule that something is much publicized, but no practical action is taken. Derogatory.

打雷的声音很大，但是雨下得却不多。比喻声势大行动少，或说得好听做得很差。多用来讽刺宣传的力度大，但没有相应的行动。具有贬义色彩。