Juvia from Fairy Tail often say “drip drip drop” How is it in japanese? please :)?

In the original Japanese, Juvia says しんしんと (涔々と) “shinshin to”.

It doesn’t literally mean “drip drip drop”, but rather しんしん is an adverb (that takes と) in Japanese, meaning “to fall heavily (as in rain or snow)”. The English dub just changed the saying to “drip drip drop” probably just to match the mouth movements and the general pattern.