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much like when someone has a chaperon when trying a drug for the first time, a person who plans to play with electricity needs a circuit breaker to kill the power if they are electrocuted.
1) "Hey man, i'm trying to jumpstart bob's car. can you be my circuit breaker?"

but usually:
2) "Hey man, i'm trying to attach a car battery to my door knob. Can you circuit break for me?"
by bobthemega November 06, 2011
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