Armpit Day

I figured I'd have to explain.
Monday is the start of the week
Wednesday is 'hump day'
Thursday means 'tomorrow is Friday'
And Friday is TGIF
So where does that leave Tuesday? That's why one of my friends in college deemed Tuesday 'armpit' day - it is the armpit of th week.
Now if someone could remind me fo WHO came up with that - Keri, Amy, Pamela, Beth - those are the likely suspects - but my memory fails me.
Happy Armpit Day!