Spiritual Allotment

A prosaic name for the toilet.
Men who don't have access to a private outdoor space will often repair to the WC for a bit of peace and quiet.

Woman: You were in the toilet a long time. Are you constipated again?
Man: No I just needed to spend some time on my spiritual allotment.
Woman (mutters under breath): That's why it smells like manure in there then.