Shmerdo
A teenage person, usually american, who speaks and expresses him/herself in an uncomprehensible jibberish, impossible to be understood by others.
<Jim> Hey, did you understand Henry's oral presentation this morning?
<Bob> I didn't get a word of it, that guy is such a shmerdo!
<Bob> I didn't get a word of it, that guy is such a shmerdo!