I used to visit 9gag, then I realized the site is awful and full of stupid posts/things I don't care about. They seem propense to force bad memes and overuse old memes that they did not create, often using these incorrectly. I don't go there anymore, unless I have nothing else to do. But I dislike the people who find the things posted there "hilarious". Also, the following is a nice list posted by someone on a site which basically describes 9gag jokes/posts:
- leleleleleleleleelelel le me sat le on the le toile le let when le mum hit le switch on le wall and le light totally went le out le door
- If you were born in the 90s like this xd
- I CANT LIVE ON THIS PLANET ANYMORE
- this thread is still 140% better love story than Twilight Level: Asian
- That awkward moment when *something that happens everyday*
- Today mom told me to do my homework, I told her to go to the kitchen and then she got mad, and then I was like "U MAD ? U MAD ?". True Story !
As for the funniest thing I have ever seen in 9gag, I have no idea. But I'm sure it wasn't created by 9gag posters.