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!!!
Person 1: (whispers) Washington was un thicc boi, am I right?
Person 2: (Trying to muffle their laughter) Hell yeah!!!
by rootbeer&icecream May 4, 2018
Get the un thicc boimug. 
Thicc is slang for the word thick. People use the word thick to describe objects, textures, and sometimes people’s intelligence. However, ‘thicc’ is generally used to describe objects, textures and people’s appearance rather than intelligence.
When pronounced, they sound the same, so you can only really tell when people use ‘thicc’ when they type it.
When pronounced, they sound the same, so you can only really tell when people use ‘thicc’ when they type it.
Reyna: This slime is sooo thicc...
Jade: I know, right!
Astrid: I want to be skinny.
Hannah: Yah, me too.
Astrid: What about you, Mimi?
Mimi: I wanna be thicc. I wanna have thicc legs, a thicc body.
Jade: I know, right!
Astrid: I want to be skinny.
Hannah: Yah, me too.
Astrid: What about you, Mimi?
Mimi: I wanna be thicc. I wanna have thicc legs, a thicc body.
by Tr.uth.ful.ly October 31, 2018
Get the Thiccmug. Dam she thicc
by Bigboipewd June 19, 2020
Get the Thiccmug. by PBJelly6 December 17, 2023
Get the thicc juicy thighsmug. “Boy, you know you needa come gimme that dick. Imma hit it from the back cuz I'm thicc.”
2. “How thick can you get?” -Ron Weasley
2. “How thick can you get?” -Ron Weasley
by frabrizio October 4, 2020
Get the thiccmug. by itchyd November 3, 2022
Get the Dummy thiccmug.