when a boy is going out with a girl and has absolutly no say in what he does, how he acts, thinks or the things he's allowed to say . The boy is completly dominated in everyway imaginable and is a boy but a bitch hence the name bitch boy.
tom: may i please see my freinds and go to the toilet, i have alredy pissed myself twice?
nicole: no, you may only speak to me and piss in the bucket i provide
dario: jesus tom you are a bitch boy we are no longer friends