Group siren hattage is when a group of people, typically managers, are investigating one person in an attempt to get said person into trouble.
Sally was caught eating a chocolate bar during her shift, some serious group siren hattage had taken place that day when they were all swarmed around her, asking her all sorts of questions.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.