Do not dumb here!

No dumb area!

I originally saw this sign printed as a sticker from Youtuber AvE. As far as I can tell it's not an original creation, and seems to have been circulating in a variety of forms on the open internet for many years.

The Japanese text reads approximately “please do not leave garbage here”. Thus the humorous mistranslation of "do not dumb here” instead of “do not dump here”