dog in the manger
01
自分は使わず人にも使わせない人, 意地悪な独占屋
someone who selfishly prevents others from using or enjoying something that they themselves have no use for
idiom
例
The new employee does n't like the project but wo n't let anyone else take over. He's acting like a dog in the manger.
自分が使わないなら意地悪しないで、妹に自転車を使わせてあげなよ。
