Done Does anyone know what okabaka means?

[Guren no heya kara]

Hello.
I have a character with a hippo face (kaokaba) and his rival makes fun of him spouting
that saying it backwards you get a 陸バカ and the author gives us the reading as okabaka.
The only thing I found that could work is about the 陸の三馬鹿 which after reading the entire
stories about these army men could pass as "three idiots".
However, this guy is the leader of a small gang...four people in total. So...
Any idea?

 

[Guren no heya kara]

Hello, I have found nothing, so I simply went with "idiot" (three idiots in my case) for this guy's henchmen and moved on.

 

[NibbPower]

When you ask for help, it's best to give the full content of the line you need help on. I believe it was just referring to the person as an idiot. Like in Black Clover, Asta and Idiot becomes Bakasta. So it could possibly be someone's name or referring to a person nickname.