What do you think about me taking my friend's idea and applying it to a meme and post it on reddit?
Why do you want to use your friend's idea and apply it to a meme and post it on reddit for karma?
I don't like my friend very much, he always posts stolen memes on facebook,
You need to respect the time and effort that other's put into their work. It is not acceptable to steal someone else's work and use it as your own. Your friend could get a lawyer and enforce copyright laws.
Nah, I'm going to post it any way. Karma, get it?
It's create that you're not going to take your friend's idea. It's best to respect other people's creativity.