A useful instintual tool used by women to determine the size (or lack there of) of nearby man junk. The cousin to the gay-dar.
Oh, Becky, my peter-meter's going off. That guy must be packin' some serious schlong.
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A woman who is very sexually promiscuous. Originates from the idea that said woman's vagina is like a meter for "peters" (penises). Can refer to either the woman or her vagina.
John: So what happened after you left the bar with that chick last night?
Mike: We got it on, but that bitch was such a peter meter she was bonin someone else before I was out the door!
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A cock that is even smaller than an infamous millimeter peter; therefore, it will never see a pussy in its life.
Jerry, who had a pico-meter peter, looked at Lawrence's millimeter peter and started to envy him.
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A BIG BONER, I MEAN FUCKING MEGAN FOX MUST HAVE WALKED BY TO GIVE U THAT
HAHA look at his 5 meter peter
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Ones sense that the person standing in front of you is male even though they're dressed as a female.
I was at a bar and this person walked up to me. My Peter meter immediately went off knowing that she had a dick.