"Self pub" is short for self-publishing, which means to independently create, produce, and distribute your own book or other written work without the involvement of a traditional publishing company.
IMO, the conversation on self pub revolves too often around the platforms and methodologies of publishing, and not enough around the sharing of game changing ideas. (thecreativepenn.com)
I have been a literary agent in traditional publishing for 20 years but now am moving into self pub. (wiseinkblog.com)