If “worst” is objectionable for some, we can go with “near” or “lazy”. Or slant rhyme.
In the following line from Frank Zappa’s “Can’t Afford No Shoes”…
…trying to sneak in that “emergent” rhyme with “detergent”, and the “load/toad/stowed” thing …naaaaaa.
Rob Wright of Nomeansno trying to find a rhyme here:
Above me is a black obelisk
And the dangers that I risk
Again, I’ll have to go with, well - a bit of a stretch, for me.
David Thomas triying to be clever (which, admittedly, he often can be) in Pere Ubu’s “Petrified” with this beauty:
I know there’s more on the tip of the ole tongue.
The first two examples being more a lameness than off-rhyme issue.