An emphatic colloquial form of 'sugoku' meaning 'really/very/extremely'; used to strongly emphasize degree in casual speech.
今日はすっごく疲れたから早く寝る。
I'm really exhausted today, so I'm going to bed early.
彼の作ったカレーはすっごくおいしかった。
The curry he made was super delicious.
その映画はすっごく面白くて、何度も観たくなる。
That movie was so interesting I want to watch it again and again.
このバッグ、すっごく高かったけど気に入っている。
This bag was really expensive, but I like it.