いじめてた

was bullying, was teasing

→ いじめる
verb · imperfect indicative Rare #39,166
was bullying, was teasing Colloquial contraction of いじめていた.
JA: 彼は学校で友達をいじめてた。
EN: He was bullying his friend at school.
Conjugation of いじめる
Indicative imperfect
いじめてた

いじめてた奴と友達

Friends with the person who bullied you?

— 映画 聲の形 (2016)

と違って直ちゃん積極的に西宮さんいじめてた一緒にしちゃいけない

Unlike me, Nao was actively bullying Nishimiya. You shouldn't lump us together.

— 映画 聲の形 (2016)

石田くん西宮さんいじめてた

Ishida was bullying Nishimiya!

— 映画 聲の形 (2016)

真柴くん石田くんある女の子をいじめてた

Mashiba, Ishida used to bully a girl a long time ago.

— 映画 聲の形 (2016)