Kakarrot
Kakarot is Goku’s Saiyan name. Vegeta says it when he’s mad. Everyone else says Goku when they’re happy. It’s like a Saiyan insult that’s also a name.
'Kakarot, you’re the worst warrior I’ve ever seen!', Vegeta
'Kakarot, I’m gonna eat you!', Goku
'Why do they call him Kakarot? It’s like a Saiyan insult!', Trunks