There’s no official spelling but when Captain Nu'Daq was quickly and effortlessly defeated by Data in the *B'aht Qul* challenge (a form of Klingon arm wrestling), he exclaimed *Maw’tok!* in shock.  (TNG "The Chase")

You can also say {ghuy'cha'}:

CK (audio):  Here's another word with strong force. A Klingon might say it after receiving an unsettling communique. It's a LOT stronger than the Terran “Darn it!"

--Voragh

From: tlhIngan-Hol [mailto:tlhingan-hol-bounces@lists.kli.org] On Behalf Of mayqel qunenoS

There are klingon words to express extreme anger (for example {Qu'vatlh}.

Is there a word/expression to say when you are suddenly surprised ?

qunnoq