chop and change
US /tʃɒp ənd tʃeɪndʒ/
UK /tʃɒp ənd tʃeɪndʒ/

1.
反覆無常, 朝令夕改
to keep changing your mind or opinions, or to keep changing what you are doing
:
•
He's always chopping and changing his plans, so it's hard to make arrangements.
他總是反覆無常地改變計畫,所以很難安排。
•
The government has been chopping and changing its policies on education.
政府一直在反覆修改其教育政策。