The "I Have No Idea What I'm Doing" meme is applied to pictures of animals doing tasks they shouldn't be able to do. Typically, it's an anthropomorphized dog, which makes these adorably silly pictures perfect for people who like the Dog Fort meme or UPROXX's own Dog Fort webcomic.
The meme started on February 27th, 2011, when The Frogman (née Ben Grelle) posted a picture of a dog doing wedding photography with the caption, "I have no idea what I'm doing." Since then, that picture and many other variations with a similar catchphrase have gone viral, most notably at Reddit.
Here's the picture that started it all. [via]