oily; greasy; sticky — a mimetic word describing a surface covered with oil, grease, or grime.
朝ごはんを作ったら、フライパンがギトギトになって洗うのが大変だった。
After cooking breakfast, the frying pan got all greasy and it was hard to wash.
食べた後に手がギトギトしてスマホが触れない。
My hands are sticky with grease after eating, so I can't touch my phone.
あのラーメン屋はいつも厨房がギトギトしていると評判だ。
That ramen shop has a reputation for always having a greasy kitchen.