Wǒ búzàihū biérén zěnme shuō wǒ.
我不在乎别人怎么说我。
I don't care what people say about me.
Notes:
我(wǒ): I
不在乎(búzàihū): don't care
别人(biérén): other people
怎么(zěnme): how
说(shuō): to say, to talk about
Example:
A:他们都说你很傻。
Tāmen dōu shuō nǐ hěn shǎ.
They say you're foolish.
B:我不在乎别人怎么说我。
Wǒ búzàihū biérén zěnme shuō wǒ.
I don't care what people say about me.