I've always been bothered by the word "motherboard" - the whole basic concept of the mother with slots and such leaves me feeling a bit yucky. And thinking of the motherboard and daughterboards doesn't help any.
And I hate the term some use Mobo - argh... the mental picture I get is MoFo which isn't nice at all. I use MB if I get lazy typing.
"For every expert there is an equal and opposite expert."