but thanks to the trusty Internet and Google Search my confusion was solved - I know I will be explaining this to those who have already heard about it, which is most of you, as you are obviously way way ahead of me. But for those of you, like me, who wondered about this saying, the meaning turns out to be likened to a camel's back with the hump on the camel being mid week (Wednesday), hence the comments on blogs I saw yesterday...dah! The phrase coming from:
"The middle of the working week, being Wednesday, and used in the context of climbing a hill to get through a difficult week. Once you are over Wednesday you are down hill towards the weekend".
So, Happy Belated Hump Day everyone!