How do I deal with racism?

How do I deal with racist assholes in school?

There’s an annoying kid named Jameson who keeps going up to me, and making fun of me, but it’s always some low level shit like “take a shower you dirty Indian” or “shut up bro you’re Indian” or “make fart noises, behind me” it’s always some low baring shit like this, and the thing is the dude is not good looking at all, his teeth are fucked up, he looks like conquest from invincible mixed with James Charles, he’s also in 11th grade and still in geometry, and he only hangs out with kids younger than him. I’m 100% sure I can take him in a fight, but like whenever I say something against him he just goes “your Indian” or whatever