B Button (blood Type) on Snapchat

What it signals here

friend system usage

Sometimes used in usernames or display names by meme-aware users as a humorous personality signal.

streak use

Rarely used in streaks; may appear in streak messages as a one-character absurdist response.

story meaning

Appears in Snap stories with text overlays replacing B letters in captions for comedic effect.

snap context

Used between friends who share meme literacy as a quick comedic shorthand in casual snaps.

See it elsewhere