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PTBR:

- It is as much as so much it has been (Tanto faz como tanto fez)

- I'm barely sanding myself (Estou pouco me lixando)

Also BR:

- I'm shitting and walking ("estou cagando e andando");

- My as* doesn't even itch ("meu c* nem pinica").

- What about Kiko? ("e o Kiko?" -- trust me this one is hard to explain).

EDIT: formatting

"Kiko" comes from "O que é que eu tenho a ver com isso?" (Something like "What's it got to do with me?"). When you pronounce this phrase fast in Brazilian Portuguese it sounds like "Ki ko tenho a ver com isso?" and then became the slang "kiko".

Also the more vulgar “I’m shitting myself (a little)” (“estou-me (um bocado) a cagar”)

We can go down a bit more, "estou cagando e andando"