One of the "realms" or "worlds" discussed and dealt with in anime such as Yu Yu Hakusho, specifically. In this anime, there are three: Makai-demon world; Reikai-spirit world; and Ningenkai-human/mortal world.
It is from this place that all demons originated, infiltrating human world through portals.
The control of these portals becomes a major issue in the series.
Later on, introduced as being ruled by three strong demons, Yomi, Raizen, and Mukuro.
"The tunnel to Makai is opening."
by Draith April 12, 2005
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Basically saying something like 'Im okay', but it comes out fast.

Or.

Saying 'okay' while stoned
Mom: Sweetheart you okay?
You: Makay mom.
by fetus deletus September 11, 2014
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Introducing to you something that no one will never understand or ever comprehend. This is word stands for a deeper and greater meaning then the typical sisterhood way. It's a new restored and newly developed organisation that will take over this planet and future planets.

Not to give away anymore information however this is the beginning of new something. Something big.

#ProptheticSpeaking
Who are they?

That's the Makai's... their something not to mess with unless you wanna get killed.

Got it.
by hersoloo September 2, 2018
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Did you know that John is a Makay in class A-3? ;)
by Udbdvdvdjdkd January 31, 2017
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