(n.) - A set alarm used solely to harvest your crops in Farmville to prevent them from withering. This includes setting it very early in the morning, or during the day to tell when your crops are ready.
*Beep* *Beep* *Beep*
Farmer 1: "...What the hell, it's 4:30 in the morning.."
Farmer 1: "Oh shit, that's the farm alarm! My artichokes are finally harvested!"