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A P. K. E. meter is a silly gadget from the Ghostbusters movies that tries to find ghosts by wiggling around like a drunkard. It also tells you how much ghost poop is floating in the air.
My P. K. E. meter went nuts when Slimer showed up. It was like it had a hangover.
The meter went off like a fire alarm when the ghost of my math teacher came through the wall.
I pointed my P. K. E. meter at the ghost and it screamed like a baby.