Shortened form of "y u no," itself a
corruption of "Why
don't you." Commonly used by
l33t hax0rs and twitter users.
Pronounced "Why you no."
Internet
user: Webcomics yuno bottomless?
Twitterer: @GBush yuno get impeached #medicare #
yolo #iraq #
winning
Hax0r: GENTOO YUNO HAVE FFMPEG!?$!?@#!1#?!