I love an old fashioned non swear. Wazzock, and pillock spring to mind. I'm also partial to the slightly stronger 'toss-pot'. I find they often get more of a reaction than proper swearing, although obviously I do a fair bit of that too

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I admire your selection - I also use them, plus "tosser" and "melt" are among my favourite non-swears, but I also like "twonk" and "prawn". Then I move into dodgier territory - as you say, "toss-pot", but also "wanker", "tit", "
hole", and "baw'bag" (which I learned from a Scottish friend). Then we go into proper swearing - and I'm pretty bad sometimes, but never the c-word. It's just horrible. If other people use it, it's their choice, but I just
can't.
I do use bugger", but it's more a term of affection these days.
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If they know where he’s taken it 100% then…tell the police?
But what if he is On The Spectrum and can't help himself? Surely he deserves pity rather than censure. These stolen cats may be his only company.
Did no-one ask how old he was? Could have been dementia.