Context: Tetsutetsu Tetsutetsu 鉄哲徹鐵, whose body turns into "iron," tetsu 鉄, explains why he is the to face Todoroki Shouto 轟焦凍 in battle, who can use fire.
kikanee kara da yo 効かねェからだよ Because [it] doesn't have effect! Because the fire doesn't work on me!
kiku 効く To have effect.
kondo a Tetsutetsu ga chinchin da yo oi...!! 今度ァてつてつがチンチンだよオイ･･･！！ Tetsutetsu is chinchin now, oy...!!
