I assume you are talking about your username and not a speedrun maneuver. This shouldn't be in the dignified Marble Blast section of the forums, but I suppose this kind of thread is otherwise allowed. Try not to double-post; edit your posts instead. I will entertain you and the people gawking from Discord.
I have done very little previous research on trademark law, but after a mild-length straightforward browsing of the internet, I have come to the following superficial understanding:
Practically, words cannot be patented or copyrighted, but they can be trademarked. The purpose of a trademark is to avoid confusion of providers of goods or services with each other, so if a word doesn't fulfill this purpose, it is not a trademark. Accordingly, trademark rights are limited by whether the trademark is actually used and the class of good or service it is used to identify (so the same word can be used independently for different classes of products). I can't find a clear explanation of where a trademark can exist for noncommercial goods or services.
Trademarks can be used without registry, but with much more limitation on suing infringers. To register a trademark, an application must be made to the USPTO. There is a fee.