Part of a circuit formed with a unijunction transistor and a capacitor. It creates a triangle wave and can be used as a timer instead of a 555 timer.
Why exactly you would look up this "smart" thing on urban dictionary is a long mystery.
He used a Unijunction Transistor relaxation Oscillator to create a flashing light to annoy his friends while they slept.
A male sibling who identifies, and dresses, as a female.
If you think my sister is hot, I must warn you that she is my transistor.