This is the 6471st most frequent Japanese word.
ズリ
"ズリ" typically refers to "gravel" or "quarry material" in construction contexts but can also be slang depending on usage.
Used colloquially to describe someone or something as cunning or sly.
それはズリだと思う。
I think that's sly.
Used to describe the sound or motion of something being dragged.
このアニメのキャラクターはズリズリと進む。
The character in this anime moves by dragging itself.
Suggests a trick or special idea someone has to succeed or gain an advantage.