flip-flopper

noun
UK /ˈflɪpˌflɒp.ər/
US /ˈflɪpˌflɑː.pɚ/

A flip-flopper is someone who keeps changing their mind.

The coach called him a flip-flopper because he kept switching which team he wanted to join.


OTHER MEANINGS

2. A person who changes their political opinions often to win votes.

Voters grew tired of the flip-flopper who promised something different every week.

3. Someone who reverses a decision they made earlier.

After saying no to the trip, she became a flip-flopper and booked a ticket the next day.

4. A person who cannot stick with one plan or choice.

Being a flip-flopper made it hard for his friends to count on him.