B Button Emoji is an ideogram featuring a red block with the letter ?B? written inside. While some have used to symbol to represent the B blood type, it has also been used online to represent the Bloods street gang and the kinship slang term ?B? (short for ?brother?). Additionally, characters in words are often replaced with the emoji within circle jerk and ironic meme communities, most notably the ?g? letters in the word ?nigga.?