There are many oral sounds commonly used in showing speakers' emotions:
hmm = I am thinking...
psst = look at me
shh = hush, you dumb a**
I think bzzt probably is a new word = PSST (YOU LOOK AT ME, YOU DUMB A**)
2012-06-25 20:25:05 補充：
Oh, by the way, they are probably the only English words without vowels.
2012-06-26 00:01:32 補充：
He taught me how to explain those words last week. Did you know him? I will convey the greetings.
2012-06-26 05:08:00 補充：
OK, WPG dude, you've got me - m, n are indeed 2 of the nasal consonants in Eng. But don't you be too tough on one just graduated from HS. I have no interest in studying human languages.
2012-06-27 01:58:19 補充：
No offence taken either.