Londoner’s disease

The act of Paedophilia or cousin marriage. A reference to the disproportionately large number of cousin marriages and acts of paedophilia that statistically happen inside the Greater London area. People from the rest of the U.K. refer to paedophiles as being afflicted with the “Londoner’s disease”.

“See that guy Luke? Guy who just moved from Tottenham? Checked him out on the register. Turns out he’s got the Londoner’s disease”