The thunder icon in Roblox chat usually means the quick chat / chat action button, letting you open or use chat faster in an experience. Roblox’s help page says chat can be opened from the icon at the top-left of the screen, and chat features depend on what the developer enabled in that experience.

What it can mean

  • In many Roblox experiences, a thunder or lightning-style icon is used as a shortcut for chat-related actions.
  • It may also appear in some games as part of the experience’s own UI, so the exact meaning can vary.
  • If the icon is next to a player name or in a game-specific menu, it may be a custom badge or feature from that experience rather than Roblox itself.

How to check

  1. Tap or click the icon.
  2. See whether it opens chat, a quick-message menu, or an experience-specific panel.
  3. Compare it with other icons in the same game, since Roblox experiences often add their own symbols.

Most likely answer

If you saw it in the chat area, it is most likely a quick access chat icon rather than something dangerous or secret. If you want, I can help identify it more precisely if you describe where the icon appears or what it looks like.