Any time multiple alarm clocks go off to wake you up, usually witnessed by people who have a hard time waking up in the morning.
I had to set the alarms on my cell phone, Nintendo DS, stereo, television, and alarm clock in order to wake up. When they all went off it was alarmageddon.
by kcs at0m1k October 12, 2008
1 more definition
When multiple alarm clocks go off simultaneously due to snooze setting intervals. Essentially, the perfect storm of snooze.
"This morning when I woke up, it was like alarmageddon, I'm never setting them for 8:15 and 8:37 again."
by Dan J. DesRochers October 17, 2008