Somebody named Rodrick who's a complete asshole. A huge jerk. So, instead of calling him by his name Rodrick, you replace the R with a D. So, it's pronounced RodDICK. This should send the message that he's a DICK.
Rodrick "Where is everyone? I thought we were supposed to meet up here."
(Elsewhere)
Person A "Did you get rid of Roddick?"
Person B "Yeah, I sent him the wrong location."