八つ: eight things

(archaic, dialect) “isn't it?” / (archaic, dialect) expresses uncertainty or indefiniteness

(informal, colloquial, slang) not do

(informal, Kansai dialect) isn't it? right?

staging an event

to be done in by / to suffer damage; to be had

passive of やる (yaru, “to do”)

(slang) to make a どや顔 (doyagao) facial expression

oh, well (an exclamation or disappointment) / sigh (interjection used when one is tired) / thank goodness (interjection of relief)

(informal) Contraction of 嫌になる (iya ni naru).