Flip-flop and New ballgame

Flip-flop noun - A changing from one policy or point of view to virtually its exact opposite.

New ballgame and flip-flop are semantically related In some cases you can replace phrase "New ballgame" with "Flip-flop", this phrases are similar.

New ballgame noun - A particular situation that is radically different from the preceding situation.

Flip-flop and new ballgame are semantically related in major change topic. Sometimes you can use "Flip-flop" instead a noun phrase "New ballgame".