Noisily; boisterously — loud, lively noise often from a group having fun.
週末は公園で子どもたちがワイワイ遊んでいた。
On the weekend, children were playing boisterously in the park.
仲間とワイワイ飲み会をした。
I had a lively drinking party with friends.
Incessantly complaining or making a fuss; pestering or going on and on about something (often critical).
クレームの電話で客がワイワイ騒いでいる。
Customers are making a fuss on complaint calls.
彼女は小さなことでもワイワイ言うタイプだ。
She tends to make a big fuss even about small things.
Loudly crying or wailing; bawling or howling (emphatic loud vocalization).
隣の家から赤ちゃんのワイワイという泣き声が聞こえる。
I can hear a baby crying loudly from the next house.
試合で負けてファンがワイワイ騒いだ。
Fans made a lot of noise after the team lost the match.