Splashing (water); splashing about energetically (often of people or animals in water).
子どもたちが川でじゃぶじゃぶ遊んでいる。
The children are splashing around in the river.
雨のせいで道がじゃぶじゃぶで歩きにくい。
The road is puddled and splashed, making it hard to walk because of the rain.
バケツの水をじゃぶじゃぶ床にまいて掃除した。
I poured the bucket of water all over the floor and cleaned, splashing water everywhere.
Vigorously or generously (e.g., pouring sauce); using plentifully without restraint.
彼はカレーにソースをじゃぶじゃぶかけるのが好きだ。
He likes to pour sauce all over his curry generously.
このレシピはオイルをじゃぶじゃぶ使うのでカロリーが高い。
This recipe uses a lot of oil, so it's high in calories.
洗濯機で服をじゃぶじゃぶ洗った。
I washed the clothes vigorously in the washing machine.
To make (or spend) a lot of money (colloquial; somewhat slangy).
その会社はヒット商品でじゃぶじゃぶ儲かっているらしい。
It seems that company is making loads of money from its hit product.
給料がよくて、彼は最近じゃぶじゃぶ使っている。
His salary is good, and lately he's been spending money freely.