Engrish can be simply defined as the humorous English mistakes that appear in Japanese advertising and product design. Most often english words are misspelled with the letter 'R' in place of 'L' leading to the name engrish.
Engrish comes from other countries besides Japan, although not usually as abundant or amusing.
Engrish.com supplies a regular assortment of hilarious engrish mistakes.
Examples of engrish:
-A sign put up during an election reads: "Erection in progress"