In conclusion, while I understand the temptation to download copyrighted content without permission, I encourage you to explore legitimate streaming and downloading options that support the creators and rights holders of the content. "Dumb and Dumber" is a classic comedy film that is worth watching, and there are many ways to enjoy it without resorting to illegal downloading.
For a general overview of downloading movies to a mobile device: Dumb And Dumber Download Vegamovies