change one's tune

[**C@RL$$**]

can anyone explain the meaning of change you tune in this sentense
i cant affornd to take everyone to the football match -you've changed your tune haven't you ?

[Tdol]

When someone changes their tune, they start talking differently, so they probably offered to take everyone to the game in the past and now are trying to get out of it.

[**C@RL$$**]

thanks tdol