Dictionary / Vocabulary / 思う壺
おもうつぼ
one's wishes; one's expectations; just as expected
Also written 思うつぼ、思うツボ、思う壷
その陰謀を画策してる人たちを必要以上に大きく見てしまうことは、まさに彼らの思うツボだと思います。
I think overestimating the people masterminding that conspiracy is exactly what they want.
向こうの思う壷だぞ。
You will play into their hands.
そんなことしたら相手の思う壺だよ。
If you do that, you're doing exactly what they want you to do.