Mr K. Dilkington
Mr K. Dilkington is the mis-spelt name of Mr Karl Pilkington on a piece of junk mail (causing much hilarity amongst Ricky and Steve) probably due to it soundling aptly ridiculous.
Written in Karl's Diary: "Got some post delivered to me today. It was addressed to Mr Dilkington. It read 'Dear Mr K. Dilkington, You are one of our most valuable customers.' I put it in the bin."
Found in Podcast Series 1, Episode 10. Also mentioned in Series 5, Episode 1: "Karl Dilkingtooon. Cuuunt."