ringburner
noun an act of defecation that is attended by burning, stinging or other painful sensations in the anus; often applied to the spicy food that causes such effects. Combines
RING (the anus) with a conventional sense of 'burn'; upper-class society origins. The following definition is offered by Ann Barr and Peter York in their 1982
Official Sloane Ranger Handbook: 'The results of a heavy curry the morning after'
UK, 1982