For one that required more effort than was comfortable:
“That one came out with his boots on”.
For one where I only just made it:
“Done before me pants hit the floor”.
For someone scratching their arse:
“Brass rubbing”.
And I’m very surprised no one has mentioned “klinkers” yet – named after the little hard bits in coal that dropped through the grate of coal fires BITD with an audible ‘klink’.