Dattebasa is borutos way of saying “yknow/ya know”. Kinda like how Naruto says dattebayo and kushina says dattebane. The way they speak is from kushina passed down to naruto then boruto
“I’m Uzumaki Kushina ya know dattebane”
“I’m Uzumaki Naruto ya know dattebayo”
“Im Uzumaki Boruto ya know dattebasa”
“I’m Uzumaki Naruto ya know dattebayo”
“Im Uzumaki Boruto ya know dattebasa”
by queen vamp June 30, 2021