Whether it's off rhyme or not is part of the schtick here. She's just sayin' stuff that shares like 1 vowel sound with the previous line. That's the point of my first two couplets, numbnuts. (Also, have you heard how Americans say 'water'? Judo and Pluto are off rhyme in Ireland, but here it's anybody's guess.)
Do you want to talk about the s/z thing in the 4th couplet while you're at it? Because there's plenty of crap to talk about in her shit.