Caveman Blues

The feeling the day after a night out, involving being severely hungover from excessive drinking or coming down from rec drugs (mostly cocaine and pills). Victim has 'the blues' and feels frail, old and ancient - like a caveman.

*throws up*
"Ugh, i'm gonna have the caveman blues tomorrow.."

*wakes up*
"You alright mate? you look like shit!"
"Nahhh, I've got some serious caveman blues.."