the.com/cracker

means A thin, crisp baked snack meant to be topped with something else — or, in American slang, a derogatory term for a white person.

from The biscuit sense comes straight from the verb 'crack,' describing the sharp snap the biscuit makes when broken — crackers were literally named for their sound. The slur sense is murkier and older than people assume: by the 1700s 'cracker' was used in the American South and Georgia-Carolina backcountry for poor rural whites, likely from 'crack' in the sense of boasting or loud talk ('to crack a joke' or 'crack wise'), describing braggarts or crackers-of-jokes, not — as a popular folk tale claims — from cracking whips as overseers. The two meanings developed independently and collided only by coincidence of spelling.