- Mad Insomniac - Funny pictures, a BBS, chat room and a mailing list.
- Mad Sophist - Humorous comment about famous people.
- Malin - Movies, pictures, games, and old cartoons from the 80s and 90s.
- Mamarocks - Musical pages, pets, humor and inspirational words.
- Mandor.net - Reviews, IRC logs and comment.
- Mark Shead - Humorous stories and pranks from the colorful life of Mark W. Shead.
- MarkBarry.com - Collection of amazing stories, movies, and images.
- Master Crappers - Funny jokes, stories and humorous lists.
- Matt Movies - Music, art, movies, music, and whatever the webmaster considers cool.
- Mavis' Hobbit Hole - Lord of the Rings related cartoons.
- McCormick, Spud - Rants about people in the news and politics plus jokes and funny pictures.
- MCM Magazine - Satirical comment and horrorscopes.
- Mentally Incontinent - Personal comment, a journal and humorous stories.
- Merrick's Page of Funnies - Attempt to make the world a brighter and happier place with limericks, funnies, jokes, and links.
- MicksWorld - Flash games, videos, pictures and bizarre stories. Also articles about chinchillas, gem craft jewellery and cycling tips.
- Midnight Dreamer - Games, neko pics, and other useless ramblings.
- Mike Lietz - Humorous articles, odd and cheesy poems, a weblog and other original content.
- Mikey's Page - Jokes and personal information.
- Minibites Place On The Net - Diverse content from song lyrics and WAV files to personal pages and relationship issues.
- Ministry of Lamination - Celebrates the transformation of the ordinary into extraordinary. Frequently asked questions, online shop, sound files of laminating various objects, and a historical perspective.
- Minor Sage's Desk - What's on my desktop, from a 'Dos-ages' perspective.
- Moles World - Insight into the mind of a terrorist Mole seeking world domination.
- Mongoosemania - Personal rants and opinions.
- Mooky.net - A humorous look at the student life of ten "mooks" in Birmingham.
- Mooquackwooftweetmeow - Random humor, stout and a weblog.
- Moss, Sheila - Newsletter of an online humor columnist. Yahoo! Groups.
- Mr. Jotz Web Site - Personal and touching stories, humor and observations.
- Muffin Fun - Bread product related humor.
- Muhammad's 400 Jokes - 400 funny jokes, sorted by category.
- My Nightmare - Jokes, humor and comment.
- My Personal Universe - Cynical commentary and rants about news, people, politics and current events.
- My Private Ramblings - Highly opinionated views of the world.
- My Repository of Useless Stuff - Featuring a swirly picture, surreal marquee and some links.
- The Madhouse - Features opinions on world events, jokes, rants, theories and morons.
- The Marshmallow Tree - Humorous site containing anime, history of hip-hop, an unofficial interview with N'Sync, dating "tips", plus a section on how to tell if your friend is a marmoset.
- The Mental Relaxorium - Features include Child of the 80's one-liners, sexiest man, Stick Couple, world's worst poetry, and virtual refrigerator gallery.
- The Most Pointless Site on the Net - A site priding itself in serving no point whatsoever.
