noun
loud speech; boasting; talking big
Refers to speaking in a loud, boastful, or exaggerated manner. Often implies showing off or making grand claims.
彼の高話にはいつも呆れてしまう。
I'm always amazed by his loud boasting.
飲み会で高話を聞かされるのはうんざりだ。
I'm fed up with hearing loud talk at drinking parties.
Compound of 高 (taka, 'high') and 話 (hanashi, 'talk, story'), with rendaku voicing to ばなし. The literal sense of 'high talk' developed into the meaning of loud or boastful speech.