Just curious.
FWIW I think it means more than one episode of cheating. Or maybe 3 or more. And cheating to me means betraying your primary relationship to pursue romance elsewhere.
I read an article online that said serial cheating has to be a pattern of deliberately finding love and that 'Whoops! I fell on your crotch' doesn't count because the person was in some sort of stupor and didn't realise they were executing a pattern (serial) until it was too late. Anyway, it annoyed me and I wanted to know what you all thought.