noun
false accusation; trumped-up charge; pretext; picking a quarrel
Used when someone makes an unfounded claim or starts a fight over a trivial or fabricated reason. Often appears in phrases like 言いがかりをつける (to pick a quarrel or make a false accusation).
彼はささいなことで言いがかりをつけてきた。
He picked a quarrel with me over something trivial.
それは全くの言いがかりだ。
That's a completely false accusation.
noun
statement one cannot take back; irrevocable remark
Refers to a statement that, once made, cannot be retracted or undone. Less common than sense 1; often used in contexts where one must take responsibility for one's words.
一度口にした言いがかりは取り消せない。
Once you've said it, you can't take back that statement.