でかいdekaiでっかいdekkai
1.

A colloquial expression used to describe something that is large or big, often in an informal or casual manner.

2.

A term that emphasizes an object or entity's notable size, often conveying a sense of impressiveness or exaggerated largeness.

3.

An informal adjective implying not just size, but also a sense of grandeur or overwhelming presence, applicable to both physical objects and abstract concepts.