A way of saying "one thicc boi". The "un" is the masculine indefinite article, meaning "a", from the Spanish language. "Thicc boi" is from the English language, and when combining these two phrases, makes a Spanglish sentence. This is a better way to say "one thicc boi" and is, from experience, more likely to get laughs. Sometimes you can say "un hella thicc boi" but that can be a bit over the top.

(Eighth graders learning about U.S. History)
Person 1: (whispers) Washington was un thicc boi, am I right?
Person 2: (Trying to muffle their laughter) Hell yeah!!!

un thicc boi by rootbeer&icecream May 4, 2018

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The Thicc Boi’s Club

The Thicc Boi’s Club is the legendary Discord group, lead by YaboiEthan, famous for their spicy memes, the Waluigi/Piranha Plant cult, and raiding Furry servers

Some random Furry: *makes a Discord*

The Thicc Boi’s Club: Raid time!

The Thicc Boi’s Club by Niggasaki, The Piranha Plant November 9, 2018

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