A bullshit attachment that noobs use when playing Call Of Duty. In case you never played the game, it sticks out of your primary weapon and red dots flash on it when an opponent is near. When using a weapon with a heartbeat sensor attached, the user will usually camp in a corner of a room and watch it closely until someone comes close so they can easily kill their opponent. In my opinion, it is a more annoying attachment than the noob tube.
Stru: WTF! How the hell did he know I was there?! I didn't know it was possible to screen watch online!

Bryan: Nah, man. Calm your nuts. It was just another noob and his heartbeat sensor.
by NotMattStru January 24, 2010
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The nerve sensor inside your rectum that causes you to feel an increasing urgency to poop the closer you get to a toilet. The proximity sensor is activated by an already present need to take a crap. Once in the vicinity of a restroom, your proximity sensor will alert you that you are running out of time to reach the toilet and drop your pants, or suffer the consequences...
As I walked towards the bathroom, cheeks tightly clenched, my proximity sensor went crazy and I nearly pooped my pants before I could sit down.
by igottago... July 29, 2011
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The sensor installed inside the drivers seat of most modern vehicles. It is designed to detect the thickness of the drivers wallet and activate when the drivers wallet becomes too fat. It usually triggers vague and inconsequential check engine lights that can only be diagnosed and fixed by the dealership at an exorbitant price. The sensor is usually designed to activate about 3-6 months after the car is out of warranty. Once the sensor has detected that the wallet has become sufficiently thinner it will then wait 6-9 months before reactivating and will continue to do so in perpetuity.
The wallet sensor triggered my check engine light. Only the dealership has the equipment to read the code. They said it will be $300 for a diagnosis.
by 03specv February 3, 2021
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When Pulse deploys his cardiac Sensor
Look He Deployed his Cardiac Sensor !
Cardiac Sensor Deployed
by Vamorim May 26, 2023
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An commonly used attachment in the popular video game Call of Duty: Modern Warfare 2, which shows an enemies heart beat as a red dot on a sensor. Most commonly used amongst 'Nivens' to locate an enemy.
Hey guys, I've got my Niv-beat sensor equipped.
by eliteskillzzz April 2, 2010
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