The brown touch is similar to the Midas touch, but instead of everything they touch turning to gold, it becomes worthless.

“棕手指”和“金手指”很像，只不过“金手指”是点石成金，而“棕手指”则是点金成土。

Example:

Mike's wrecked his third car in a year and lost his job and his girl. He's got the brown touch.

这是麦克一年内撞毁的第三辆车了，今年他不但丢了工作还被女朋友甩了。他被倒霉的“棕手指”缠住了。