a sarcastic exhalation through the teeth, immediately followed by an abbreviation of the word "yeah". Sarcastic response to a question which requires a yes or no answer. Often used by teenagers, potheads, "valleys" and surfers. Another way of sarcastically saying, "Ya think?!", "hello!" or "No doubt!"
In response to a stupid question like, "Do you think it would suck if you could never have sex again?"
Answer: (with eyes rolling) "Sheeyuh!"