Flock of Bats 

Uncontrolled, violent and quite frightening bowel action, often obliterating the original finish of the toilet bowl. Similar to a Flock of Sparrows, but done with the lights out.

Christ, I had to shit in the dark in the en-suite so as not to wake the wife, and after that vindaloo it was like a flock of bats. My subsequent actions with the toilet brush were akin to the labours of Hercules.

Flock of Bats by Jobsagoodun September 7, 2006