What is OYA OYA OYA?

the iconic phrase only weebs know

oya? oya oya? oya oya oya

OYA OYA OYA - video

OYA OYA OYA - what is it?

Something only weebs know. More specifically, Haikyuu weebs

Oya? Oya Oya! OYA OYA OYA!