Derived from the name "Chad". Is often used to demasculinise the aforementioned individual.
Chaddo is often used to gain subject's attention, while at the same time, adding a kind of flirty, gay touch to their name.
"Hey Chaddo, can you please do what I'm asking you to do because you are less of a man than me."
"Yeah, okay, I'm going to get that done as soon as possible, Chaddo."