Hootie-hoo

[Sonia]

Greeting or call of/for recognition by member of group and/or to alert other members of desire to participate in activities calling for discretion by small group of acquainted persons moving within large group (sometimes 100s to 1000s) of unknown and unaware people, some of whom may be members of law enforcement or otherwise not inclined to view alcohol and/or drug use favorably (i.e. people who might arrest you or report you if they knew of group members activities and altered reality). Also used as an all - clear signal.