ボロを出す
1
to expose one's faults;to have one's defects exposed;to show oneself up
あいつでかいことばかり言ってるけど、そのうちぼろを出すよ。
He's always talking like a big shot, but it won't be long before all his faults are exposed.
Other forms
ぼろを出す 【ぼろをだす】 · 襤褸を出す 【ぼろをだす】 (search-only kanji form)