Automatically, but in a way that, for some reason (typically because it is too complicated, or too ugly, or perhaps even too trivial), the speaker doesn't feel like explaining to you.

This term is quite old, going back at least to the mid-70s in jargon and probably much earlier. The word `automagic' occurred in advertising (for a shirt-ironing gadget) as far back as the late 1940s.
"The C-INTERCAL compiler generates C, then automagically invokes cc(1) to produce an executable."
by Biohertz January 31, 2003
adv. Something that happens automatically, but that also has some mysterious, "magical" element to it. "Smart" appliances, features, etc. that do intelligent things with less help than you might expect.
I installed Windows, and it screwed up my system automagically!
by The Grammar Nazi January 13, 2002
When you have coffee, work gets done automagically
Wow, how did you get 30 hours of work done in 5?

Automagically.
by flyingrunion May 26, 2018
When an action automatically happens and you are amazed how it happened.
The words automagically tabed in the Microsoft Word document when I clicked ok.
by Jpaschen September 15, 2010
pertaining to the one's belief that the best will happen with no effort on her/his part.
The 2011 NYS budge will automagically appear (despite the Legislature failing to create it).
by native gardener May 28, 2010
to perceive something has happening all on its own, as if by magic; a way to describe something that is both automatic and magical
your such a pig, do you think this place just cleans itself automagically or what?
by bossopolis March 14, 2011
Extremely annoying word computer nerds use to describe things software does by itself and with no exception would be far better replaced with the word 'automatically'.
The system will automagically create the next user id number for you.
by Jonny Random December 9, 2007