Top definition
has no meaning, only used when you wanna catch dumb people's attention. it's a new version of "yoohooo" or "are you there"
(3:21:15 PM) ESCO: YOOKOU!!!
(3:23:33 PM) KATT--: what the hell is a "yookou"?
(3:25:31 PM) ESCO: i just used it to get your attention.
(3:28:37 PM) KATT--: lmaoooooooooooooo
by ESCOBEN and KATT-- August 26, 2008
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