나한테 너무 뭐라고 하지마
Don't be too hard on me. As an expression i just remember it as a whole but when i look at it literally it does not make much sense as a sentence: don't say what it is too much to me. Could someone please tell me how this comes around to its idiomatic meaning?

Question

나한테 너무 뭐라고 하지마
Don't be too hard on me.  As an expression i just remember it as a whole but when i look at it literally it does not make much sense as a sentence:  don't say what it is too much to me.  Could someone please tell me how this comes around to its idiomatic meaning?

Answer

"나한테 너무 뭐라고 하지마"

Since you say "don't say what it is too much to me.", you might be taking it like 나한테 [너무 뭐라고] 하지 마.
That's not the right way,  It is more like 나한테 너무 [뭐라고 하지] 마.

뭐라(고) 하다 has two meanings: 1) say something (in the literal sense), 2) complain or make accusation.
#2 meaning probably comes from the notion that people bring up something serious (say something) usually because there is something not to their liking.

So the phrase is basically 나한테 뭐라고 하지 마 (Don't be so critical, don't accuse me) with the intensifier 너무.

Answer

뭐라 하다 is the tricky part.
It means "to scold for every single action"

I think the rest is self explanatory.

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