please explain

there was a teenage boy (and the fact that it was a boy isn't important to the story, I just like that it was a boy) wearing a t-shirt. as people do.

the t-shirt said, 'girl skateboard' but the "o" was done up like the "o" in Ghost Busters with the ghost in it.

and I don't understand how that is all connected.

what do ghosts (ghost busters?) have to do with girl skateboards. or the other way around.

someone help me connect the dots, please.