Brazilian Portuguese speakers change ‘t’ and ‘d’ to ‘ch’ and ‘j’ respectively before ‘i’ and ‘e’ sounds. For example, the word ‘de’ meaning ‘of/from’ is pronounced more like ‘juh’. In Portugal, though, they use a hard ‘d’.

Could you give me some exemples of ‘de’ sounding like ‘juh’? It may be because Brasil is a really big place, or a language barrier, but I never heard anyone pronounce ‘de’ like like that, what I commonly see, especially since I also do it, is changing ‘de’ to ‘di’ and ‘do’ to ‘du’ when speaking. Also, this happens with many words with ‘o’ and ‘e’, a lot of people just replace ‘o’ with ‘u’ and ‘e’ with ‘i’.

You are not wrong, but you are no right either. Here the OK hand gesture is just that, the OK hand gesture, there’s a similar gesture meant to be insulting, but it’s largely context dependent.