Did you mean: guikou kaikou gaizhou gaoyou gaikuo gaishu guiyou caigou ?
| 改口 | gǎi kǒu | to change one's tune / to modify one's previous remark / to change the way one addresses sb (as when one marries and starts to call one's husband's parents 爸爸[ba4 ba5] and 媽媽|妈妈[ma1 ma5]) |