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1.
The alarm describes a freaky asian girl's orgasm. When she continuously wails that high pitch, the sound resembles an alarm hence the name alarm.
I was fuckin this asian chick and i thought the fire alarm went off.
by jeffr April 27, 2008
 
2.
An audible alert to wake you up in the morning.
He set Alarm to wake him up for work.

Plural: He set 2 larms to wake his tired ass up.
by Green31 July 10, 2014
 
3.
9:00 pm when a girl needs to take her birth control pill
Hey Emily, guess what? Alarm!
by nicole77 July 02, 2007
 
4.
Someone who is clearly homosexual and in denial.
Scott is a total alarm and he doesn't know it.
by Scott February 15, 2005