bad acting; wooden performance
Derogatory term for stiff, unconvincing acting, likening the performer to a daikon radish. Often used in entertainment contexts.
See also: 大根役者
I was disappointed by his wooden acting.
That actor is famous for his bad acting.
Refers to a bad actor (person), while 大根演技 refers to the poor performance itself.
From 大根 (daikon radish) + 演技 (acting). The daikon is associated with being plain, stiff, and lacking flavor, metaphorically extended to poor acting.