1 definition by Snowglobe

A total school lockdown, usually done in public schools about twice a week. All the classroom doors are locked, the windows are covered, and the students have to put their heads down. Teachers usually either run away or hide under their desks.

Reasons for a Code Blue are the presence of guns or knives, major fights, or bomb threats. The annoucement comes over the P.A., and is usually ignored if no shots are heard.
"Code Blue! I repeat, Code Blue!"

"Yeah, yeah, we heard you the first time.
by Snowglobe December 18, 2005
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