Ma Yesh Lach (Mah Yesh Lacchhh) – What’s wrong with you? What the fuck?
Now on it’s own it’s a pretty useful phrase usually asked as a question. When someone is dicking around it’s useful to ask what the hell are you doing. However, the literal translation is something along the lines of “What have you?” It gave me the image of many indignant British folk up in arms about having their lifestyles ruffled.