vibe check /ˈvaɪbˌt͡ʃɛk/noun 1verb 1forms 3 noun1 •(slang) An impromptu attempt to ascertain mood, opinions, or attributes.The Honey BBQ wings tasted a little off. I can't quite put my finger on it, but I know they didn't pass the vibe check. — 2019 verb1 •(slang) To perform a vibe check on (somebody).“We've got to vibe-check leaders on the planet,” said one student in the group. — 2019 formsvibe checked · vibe checking · vibe checks