Please note that I've tried googling variations on this, but usually just end up with "words that rhyme with unexpected" which is obviously not what I'm going for.
There's a technique I've seen used often, in parody songs/raps especially, where the usual rhyming scheme is subverted and a line ends with something else that doesn't rhyme, and I'm wondering if there's a specific literary term for this.
For example, in the Game of Thrones Recap Rap, there's a part where Ryan Tellez is talking about Joffrey and says "He's the biggest f***ing asshole I've ever f***ing seen, I punch my TV every time he comes on screen!" but then later he's talking about Ramsay Bolton and subverts a repetition of it with "He's the biggest f***ing asshole I've ever f***ing seen, I punch my TV every time he...oh I did that one already."
Most often when I see this employed, the ending of the line is sung/spoken rapidly to still fit the music and usually in a deadpan tone.