noun, countable
also happy circuit board
a brain neural circuit that makes you think that things will be better, easier, or more successful than is actually possible; a happy circuit is made of neurons and a neurotransmitter (capsaicin which is the active component of capsicum)
When the voltage of his happy circuit reaches the threshold, he neglects to pay attention to imminent personal danger, regarding it as someone else's responsibility.
by Abajian October 13, 2005

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