The word "samu" is taken from samui, which means "cold".
It can be translated as "chilly", which is a Japanese parlance to describe how corny humor can be, hence the name "Chilly-Chilly Fruit".
To avoid confusion with the English version of the Hie Hie no Mi, this fruit has been translated to the Samu-Samu Fruit.
In a SBS question, a reader said their friend gave them a fruit, they ate it, and from that point on, they could only tell stupid, bad, and flat jokes. Oda answered the question by saying it was the Samu Samu no Mi.
↑ 1.01.11.2SBSOne Piece Manga — Vol. 7 (p. 26), Oda reveals to the fan question about the Samu Samu no Mi.