An unusual form of alarm used to wake one up in the morning,provided by males, usually used on females (some exceptions may apply) that may cause either intense pleasure or discomfort, depending on the user and alarm. Please note that this device does not work when the alarm is under the age of 12 or above the age of 60. One method to remedy this situation for those above the age of 60 may be a little blue pill that can be provided by your local doctor.

Batteries not needed.
there's something wrong with my alarm cock, it's started waking me up later and later nowadays
by chocolatesa August 15, 2003
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The act of purposefully waking up an unsuspecting guest by slapping your genitalia on your chest. Enacted through a "tick cock" metronome like fashion. Otherwise to rouse a partner from their slumber by doing the same thing or prodding them if aforementioned tactic does not accomplish stirring the person awake.

Not to be confused with tea bagging or mushroom printing however sometimes combined. However if you are alone an alarm clock can be denoted through morning wood.
Victim: "why are you slapping your penis on your chest? It's too early for this!"
Perpetrator: "I'm sorry your forgot to set your alarm cock"

"I woke up this morning with a stiffy. It served as an alarm cock"
by Feral Man August 2, 2014
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When you wake up two minutes before your girlfriends alarm clock goes off, masturbate above her face, and when her alarm clock rings and she awakens, you ejaculate all over her face and say "good morning...ALARM COCK!
My boyfriend did an alarm cock on me this morning as I woke up.
by wr33kxhav0k May 31, 2017
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The act of waking a person by inserting your hard penis into an orifice.
I woke that bitch up with the alarm cock

I got that fat chick out of my room by giving her the old alarm cock
by Blain Warnack September 19, 2005
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when you get such hard morning wood that it instantly awakens you from a deep sleep
that sex dream i had last night was so hot, unfortunately it was cut short by my alarm cock right before I was able to cum in Betty White's tight asshole.
by iwannafuckbettywhite July 29, 2013
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Waking up due to the discomfort from your raging morning wood.
Andy: Why are you up so early, Eric?

Eric: I got fucking alarm cocked again, this is the third time this week.
by Collard Greens November 11, 2013
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