Transcription:
A Venn diagram with the caption "Nothing to see here, folks, just a very normal venn diagram".
The diagram shows an intersection of three circles. The top shows a knife, the left shows butter, and the right shows a fly.
Intersection of top & left has a butter knife.
Top & right has a Japanese kunai.
Left & right has a butterfly.
The intersection of all three has a butterfly knife.
Weirdly, the kunai shows up when you Google for "fly knife". But the word "fly" is never mentioned on the kunai's Wikipedia page.
it's just a knife that google thinks is kinda fly, not an official name or anything
The word fly knife never showed up in Naruto.