The Rice University Neologisms Database

Quality of being suspicious and slimy/greasy in a borderline threatening way; the word itself sounds greasy or slimy; used to refer to a person. This word describes someone as being creepy. It's sound symbolism comes from how it sounds much like the word greasy. It incorporates the suspicious aspect of "sketchy" and the feeling a younger girl might get after seeing someone suspicious (slimy or greasy), possibly but not necessarily feeling somewhat objectified or violated.