A bad case of 'the shits' brought on by an extremely hot curry the night before.
Much, much worse than Bombay Bum and Rhino-Eye as, in this case, the arse crack feels as though it has been prodded with a soldering iron.
"Oh shit Babes, you'd better put a loo-roll in the fridge, I've got Karachi Crack again"
by Marko the Great August 3, 2005
Get the Karachi Crack mug.