Yup to both: to stuff something up means to completely ruin it, basically. And that IS the pattern I want to make. Mind you, it's going to be a norful challenge, inasmuch as there are nearly 300 stitches on the round needle, as one point. You may pray for me.
But I feel a popover is something less fitting than a pullover - not that the latter is form-fitting ... but it does fit at the bottom, at least, eh? Whereas the popover is a kinda shaped tent top, in a way.
Now for my question re pictures and language differences: is your avatar a spring onion? Or a scallion? Or a shallot? Or what?
I know it's somewhat off-topic, and for that I apologise.