Fetching details from the dictionary...

to be slippery; to be slimy
「滑る」 has another reading with different meanings.
この魚は滑っていて掴めない。
This fish is slimy and I can't grab it.
雨で道が滑りやすくなった。
The road became slippery from rain.
石鹸で手が滑っています。
My hands are slippery from soap.