noun
signature pose; trademark pose
A distinctive, often dramatic pose struck by a performer, character, or person to create a memorable impression, similar to a catchphrase but visual.
彼はステージに立つと、いつもの決めポーズをとった。
When he got on stage, he struck his usual signature pose.
写真を撮るとき、みんなで決めポーズを決めた。
When taking a photo, we all decided on a trademark pose together.
A signature catchphrase or line, the verbal counterpart to 決めポーズ.
Compound of 決め (kime, 'deciding' or 'signature') and ポーズ (pōzu, from English 'pose'). The term likely emerged from entertainment and pop culture to describe a performer's iconic stance.