TSUMUGU · TOCFL 4 (est.) · 詞
可不是
ㄎㄜˇ ㄅㄨˊ ㄕˋ · kěbúshì
expression — exactly so; isn't that the truth; you bet (emphatic agreement)
關 · Related
就jiùshìthe plainer agreement — that's right沒錯méicuòno mistake — same nodding-along use