Red Flag

機械支援の翻訳下書き (Japanese) for "Red Flag": A warning sign — a behavior, trait, or pattern that indicates potential harm, toxicity, or incompatibility in a person or situation. Borrowed from sports officiating and safety signaling, red flags in social media slang primarily refer to dating but apply to friendships, workplaces, and more.

“例文の下書き: He talked badly about every single one of his exes on the first date. Massive red flag.”