The phrase “+signal schmetterling” does not have a widely established meaning in standard German or common English usage. Based on the word Schmetterling , the most likely interpretation is simply “butterfly” in German.

What it may mean

  • Schmetterling = butterfly.
  • The +signal part does not appear to be a standard fixed phrase in the sources I found, so it may be a username, tag, code, or forum-specific wording rather than a dictionary expression.
  • In online or messaging contexts, a leading + can sometimes be used as a marker, but that is not enough to give the phrase a single confirmed meaning from the available information.

Likely interpretation

If you saw it in a post, chat, or username, “+signal schmetterling” is probably:

  • a stylized handle or label,
  • a keyword combination,
  • or a playful reference to “butterfly” rather than a formal phrase.

Language note

German sources consistently identify Schmetterling as the word for butterfly , and its use is ordinary vocabulary rather than slang.

Bottom line

So the safest answer is: “Schmetterling” means “butterfly,” and “+signal” does not have a clear standalone meaning here.