Slouse's Clown

The knife version of Slouse's Clown has exactly one owner: the player Slouse, who received it from Nikilis. The wiki says it was given exclusively to Slouse, which means it has never been in a box, a code, a trade-in or an event reward.

Nothing about the weapon itself is special. Its model and texture are identical to the common Clown Knife, so a player watching a round would see the same clown-themed blade that anyone can pull from an ordinary box. The only difference is the name background in the inventory, which is orange for the unique rarity instead of the gray used for common items. Everything that makes this knife rare lives in that label and in the story of who was given it.

It is half of a matching pair. A gun with the same name, Slouse's Clown (Gun), was given to the same player and copies the common Clown Gun the same way. The wiki lists no designer, no price and no tier beyond Special for either weapon.

If you are looking for a knife with this look, the common Clown Knife is the version other players can actually own. The unique one is documented here as part of the game's history of special gifts from its creator, not as an item with any route to obtain it.