0 If your heart isn't in it, you do not feel interested or enthusiastic about something:
I tried to look interested, but my heart wasn't in it.
1 you do not feel that something is exciting or interesting enough to do:
I tried to make myself feel better by playing the guitar, but my heart wasn't in it.
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
your heart isn't in it