The process of giving it to someone up the butt.
A 2011 quote from Sinead O'Connor's blog:
"Let me now take time to make VERY clear that yes I 'do anal' and in fact I would be deeply unhappy if 'doing anal' wasn't on the menu, amongst everything else$$ So if u don't like 'the difficult brown'.. Don't apply..."
not being able to 'pot the pink' due to time of month, so one must go for the 'difficult brown'
Ewwww your bleeding ... turn around