stain, spot
Tá estragando a porra da mancha criminal.
You're fucking up the damn criminal record.
— Tropa de Elite (2007)
Fique tranquilo, eu sei o que tira mancha de ketchup.
Don't worry, I know what removes ketchup stains.
— As Aventuras de Paddington 2 (2017)
A mancha marrom nas costas, parece que deitou num monte de merda.
The brown stain on his back looks like he lay down in a pile of shit.
— Mommy (2014)
Eu não consegui limpar a mancha.
I couldn't remove the stain.