Definitions by YukikoSan

ostu 

Ostu is someone really stinky. E. g. a person never showering at all.

Ostus are usually walking around with nasty hair and oily skin.

"Yo, do you see that ostu in this store?"
"She's such an ostu, she's really nasty"

ostu by YukikoSan October 11, 2022