The real Titel is actually "im not a peep" but nearly all Titels on mangago are not the original. I assume its to make the site less searchable to keep it safe since it is illegal what we are doing here, but its really a pain sometimes. I was actually looking for this fic a week ago and couldn't find it, luckily it showed up on the recommended page yesterday.
It's usually just because it was starting to be translated before there was an official translation, and that's what the translator decided to call it. Often they're just direct translations of the title in the original language. Sometimes the post changes to reflect the official English title when an official version releases, often not. I don't think they're just trying to not get caught, because if it launches in the original language alongside the English it always has the official title.

I don't understand the title name
Don't press the button?
It should be
"you think I'm cute small bird but I'm actually a gluttony bird"