Haven’t noticed any around here (SW London) but a GM from the midlands used to say ‘mithered’ for distractedly worrying or wittering about something.
Interestingly I’ve just found it in my big fat Oxford dictionary, where it says, ‘Make a fuss, moan..’. which is not the precise meaning I associate with it.
It says ‘late 17thC, of unknown origin’ though there’s something with a similar meaning in Welsh. Can any Welsh-speaking GNers elucidate? It’s ‘moedrodd’, to worry, bother, which sounds rather more like my GM’s usage.
AFAIK she had no Welsh parents or GPs, so maybe it’s a relic from long-ago times when Celtic languages were still spoken in the area.