TROLL IN THE DUNGEON!

From Fandom wank wiki

Thought you ought to know.


The phrase comes from JK Rowling's first Harry Potter novel, in Chapter 10, "Halloween":

...Professor Quirrel came sprinting into the hall, his turban askew and terror on his face. Everyone stared as he reached Professor Dumbledore's chair, slumped against the table, and gasped, "Troll — in the dungeons — thought you ought to know."

He then sank to the floor in a dead faint.

— {{{source}}}

It has since been used in wank reports (usually as the title) in which there are trolls involved, or in the comments when there's wanking inside the house.