https://www.polygon.com/fortnite/2018/10/3/17931748/fortnite-content-update-6-01-patch-notes-chiller-trap

Fortnite Season 6’s first Content Update is here, and brings with it a frosty new type trap called Chiller.

This new trap can be placed on floors, walls or ceilings, and gives whoever steps on it — friends or enemies — something called icy feet. Icy feet removes their character’s friction, and makes them slide across the ground. Thankfully, you can stop yourself by just building a wall in front of you. The Chiller trap is a Common rarity item, and drops in stacks of threes from anywhere you can normally get loot.