gottsu(i)

amazing; big; large; strong; great

Word type: I-adjectives

Standard: でかい/つよい/すごい

Standard kanji: でかい/強い/凄い

Example:

それごっつ(い)おもろい話やなあ。
That's an amazingly funny story.

Commentary:

The final い is sometimes dropped.
Also see ごつい.