Ei boi is very similar to its counter part (ya boi) however it is more like a more annoyed version.
For example. (annoying person) - hey hey you

(you the normal person) - Ei boi!
by Lemonk February 3, 2020
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Some one can do no wrong, who is specially treated, especially by an authority figure.
"She won't tell me anything about that, Im her "blue eyed boy".
by Desired and Wanted November 25, 2013
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