arse about

not-comparable slang

(slang) The wrong way round; exactly opposite to that which is desirable; contrary; conceptually inverted; wrong.

Japanese Meaning

真逆、完全に逆の状態 / 反対方向、逆向き / 期待されるものとは反対、意図的に逆に配置された状態

The map was arse about, so we kept walking the wrong way.

地図が逆さまになっていたので、私たちはずっと反対方向へ進んでしまった。

Sense（1）

(slang) The wrong way round; exactly opposite to that which is desirable; contrary; conceptually inverted; wrong.

You've got this arse-about!