I usually go with the 2 word curses and switch the first letters of each.
Like
Fother mucker or
Hit shead.
It doesn't work well with cock sucker though.
I dont replace a word with a word, if i start to say something infront of someone i shouldnt like my son, i usually just end it with gibberish, like fu....nny man, or sh...in pads, i need shin pads.... lol
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