Not really nicknames, but “mishearing on purpose” names. A thread about the musician (hope I spell this even close) Jomiriqui got me to thinking that back when he had that “slip-sliding” around the room video, I’d see it, and, thinking myself clever, say “Oh, yeah, there’s JoMama’sDaiquiri.”
Dallas, to me, was always Dull Ass.
Dynasty was Die Nasty (yeah, some of you may know that that was not original to me; I read a piece wherein Rock Hudson’s ex-companion said he called the show this while he was guesting on it)
Growing Pains was Groin Pains.
There was some British fantasy show (maybe that Robin Hood show of the mid-80s) that always spoke of the “Sword of Wayland.” Invariably, I’d quickly say “Jennings” after the word Wayland.
And so on…