blue-out
n.— «Nearly 40 percent of district teachers—3,500 employees—called in sick one day in September, prompting the early closure of six high schools and effectively crippling the district for the day. No organized action of that size had been seen in TUSD since the late 1970s. The “blue-out,” as it was called, prompted Pfeuffer and district officials to create a labor council to improve relations with employee unions.» —“The turbulent times of Roger Pfeuffer” by George B. Sánchez Arizona Daily Star (Tucson) June 22, 2008. (source: Double-Tongued Dictionary)