From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Furog (フーログ, Fūrogu; FUNimation "Froug") is a martial artist.
Furog's name is a pun on the word Frog.
Furog is a Frog-like humanoid alien.
Furog is formerly from the Southern Galaxy. He was destined to lose to Maraikoh in the Next World Tournament, but not before putting up a good fight. Furog was capable of inflating his belly to a massive size, as is seen in his fight with Maraikoh in an attempt to push him out of the ring. Maraikoh was able to throw him into a meteor, however, and out of the ring. Since he reached the quarterfinals of the Next World Tournament, one can assume that he was a good fighter, although he was completely outmatched by Maraikoh.
Son Goku easily defeated Furog in the semifinals with one kick in Dragon Ball Z: Fusion Reborn. Interestingly enough, the credits spell his name Frogue and the subtitles spell his name Clove (クローブ, Kurōbu).
Furog appeared in Dragon Ball Z: Buu's Fury.