A way of saying Boi, but in a more relaxed and carefree way. McBoi often refers to a person or thing that has made a mistake in a easy task.
How do you even do that? McBoi!
by IC3T3CH January 22, 2018
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When someone is making you mad/triggered and you need a name that isn’t bad/inappropriate so you call them a McBoi
Amanda said the sky is green so me and my friends call her a McBoi
by Rylan and Faith January 7, 2018
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An adolescent male who frequently visits the fast food restaurant McDonalds
Do you see Sam, he visits McDonalds 5 times a week, he's turned into a McBoi.
by shme21 April 17, 2017
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A boy that is bad for you but yet you keep going back to him, because he is so good. (Im lovin' it)
My mcboy friend is so hot my husband would be pissed.
by MC JOEY II January 6, 2011
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Typically refers to an annoyance, or somebody who constantly makes mistakes in extremely simple tasks.
McBoi, how did you do that?

Really? McBoi!
by IC3T3CH January 22, 2018
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