noun
arguing; criticizing; finding fault; splitting hairs
Refers to the act of persistently arguing, criticizing, or picking apart someone's words or actions, often in a nitpicking or fault-finding manner. The word itself is relatively uncommon and may carry a literary or formal tone.
彼のあげつらいにはうんざりだ。
I'm fed up with his constant fault-finding.
細かいあげつらいはやめて、本題に入ろう。
Stop splitting hairs and let's get to the main point.