꾸덕하다 (kkudeokhada) — Thick, dense, and rich in texture.

Lesson 63 in our Korean Slang series, adapted from Korean Your Teacher Doesn’t Teach You by Injin Hwang. This expression appears in the book’s food, shopping, and style section.
What 꾸덕하다 means
Describe Greek yogurt, brownies, sauces, or a creamy dessert whose texture is pleasantly substantial. The situation and tone help determine how natural the expression sounds.
A short conversation
A: 이 요거트는 어때?
B: 꾸덕해서 숟가락으로 먹기 좋아.
A: How is this yogurt?
B: It is thick, so it is great with a spoon.
Use it with care
It tells us about consistency, not sweetness. Depending on the dish, thick texture may be praise or criticism.
A neutral or polite alternative: 질감이 진하고 되직해요. — It has a thick, dense texture.
Try it yourself
Does 꾸덕하다 tell you a food is sweet?
Answer: No. It primarily describes texture. Read the Korean exchange aloud, then replace one detail with something from your own life.
Learn the rest of the series in Basic Korean Grammar. Find more expressions in the Korean slang book on Amazon.