Samu Samu no Mi

The Samu Samu no Mi is a non-canon Paramecia-type Devil Fruit, only mentioned in Oda's SBS, and eaten by an unknown reader of the series. The word "samu" can be translated as "chilly" and describes how corny humor can be, hence the name "Chilly Chilly Fruit".

Usage
In a SBS question, a reader said his friend gave him a fruit, he ate it, and from that point on, he/she could only tell stupid, bad, and flat jokes. Oda answered the question by saying it was the Samu Samu no Mi.