A security alram which is going-off in a student house, because the occupents have gone away for the weekend/vacation/summer and forgot to supply enough credit for electricity. When the credit runs out the alarm sounds intensly for days until the reserve battery power fails.

These students are a sub-set of alarmer
What's the blasted tone that's been going on for days?

Man, that's the student siren. Those kids have gone away without topping up the leccy.
by Garry Ladd July 11, 2005
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