Clown hair is the item you can get from the 50x April fools day event.
It is said to be merged with the clown nose to make the new clown spec.

Clown hair
1 minute and 1/100 change of spawning
Its unobtainable now
Video of person using Clown Hair - https://www.youtube.com/watch?v=LF-LyDmp1Is