little brother, younger brother
Take care of your little brother.
Não gosta mais do seu irmãozinho?
Don't you like your little brother anymore?
— Faça a Coisa Certa (1989)
Meu irmãozinho disse que ele teve um sonho terrível noite passada.
My little brother said he had a terrible dream last night.
Do you have a little brother?
I want a little brother.