"duh!"
Advanced English Dictionary
duh
Disdainful indication that something is obvious.
"It’s hot in the desert. - Well, duh!"
Is there a Mandarin equivalent of 'duh!'?
Yes, there is:
废话
Example:
A: You know what, a banana without the skin is more tasteful!
B: 废话。
废话 is not a good word for kids to imitate, though. And it is rarely used between strangers or to your parents, as it may be impolite/offensive.
use 废话,那还用说,很明显啊,很显然啊,when speaking to your buddy. 嗯,是啊,确实,when speaking to your college or someone in a formal situation.
咄 (duo1) should be the one.
In some places of China people also pronounce it as (qü4) to comment on an action perceived as foolish or stupid, or a statement perceived as obvious.
If you wanna reply with blame:
废话
If you don't wanna break your relationship with the other one,you can use the word:
呵呵
It gives hint to the other one that "It's a stupid question but I choose to stay as stupid as you."
My colleagues often say :
"嗯哼~"
,"Uh huh"
"显然"
,"obviously"
"然后呢"
,is not in literal meaning "Then what?" ,it means that you have said is not enough,barely nothing. And the speaker doesn't really want you to continue,like you don't have the answer.