叩(たた)き合(あ)うto strike (each other), to come to blows, to fight (each other), to speak (to each other)

同僚(どうりょう)と肩(かた)を叩(たた)き合(あ)ってお互(たが)いを労(ねぎら)う。

Colleagues strike each other on the shoulder to express mutual appreciation.

軽口(かるくち)を叩(たた)き合(あ)えるような仲(なか)に憧(あこが)れています。

I long for a relationship where we can exchange banter.

憎(にく)まれ口(ぐち)を叩(たた)き合(あ)う彼(かれ)らはみんなに嫌(きら)われている。

They are disliked by everyone for exchanging barbs with each other.

二匹(にひき)の飼(か)い猫(ねこ)がお互(たが)いに叩(たた)き合(あ)う様子(ようす)をビデオに撮(と)りました。

I recorded a video of my two pet cats fighting each other.

叩(たた)き合(あ)う喧嘩(けんか)が殴(なぐ)り合(あ)いの喧嘩(けんか)になって初(はじ)めて、暴力(ぼうりょく)の恐(おそ)ろしさを感じた。

It was not until the argument came to blows and turned into a fistfight that I felt the terror of violence.