Don't ignore my question with スルー

Vocabulary Explanation: Ignoring with スルー

Nako ponders about the teacher’s tendency to run away from her. She asks Aru if she’s really that scary-looking. Aru stands in silence for a moment before changing the subject.

アル:: 「あれ？今日(きょう)ぼっちは？」; “Oh? Where's Bocchi today?”
ぼっち:: 「おい　スルーするな」; “Hey, don't ignore me!”

Key Points

1スルーする means to ignore or let pass

スルー comes from English “through”, but in Japanese スルーする often means to ignore something.
Aru changes the subject instead of answering the awkward question, so Nako calls that out as スルー.

2するな is a blunt negative command

verb dictionary form + な tells someone not to do that action.
スルーするな means “don’t ignore it” or “don’t brush me off”.

3おい makes the complaint immediate

おい is a rough attention-getter like “hey”.
It fits Nako interrupting Aru’s attempted subject change.