also: ガミガミこえ
noun
growling voice; snarling voice
Describes a harsh, scolding, or complaining tone of voice, often used when someone is nagging or angry.
上司のがみがみ声が一日中頭から離れなかった。
I couldn't get my boss's growling voice out of my head all day.
彼女はがみがみ声で文句を言い続けた。
She kept complaining in a snarling voice.
Compound of the mimetic adverb がみがみ (naggingly, growlingly) and 声 (voice). The mimetic part is sound-symbolic; its exact origin is uncertain.