Samu Samu no Mi

The Samu Samu no Mi is a type of Devil Fruit, only mentioned in the One Piece Manga.

Humor that is described as chilly is an expression in Japan and Korea that describe how corny the humor is. 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.