- server usage
- Used in server names or channel names for communities centered around cities, transit, or names starting with M.
- reaction use
- Occasionally used as a reaction when someone mentions anything metro or M-related.
- emote mapping
- Custom emote in some servers representing a specific metro line or as a letter M badge.
- gaming context
- Used in map-related gaming channels to denote map markers or metro fast-travel points.
- role meaning
- Could be assigned as a role badge for moderators or members whose handle starts with M.