get behind
US /ɡet bɪˈhaɪnd/
UK /ɡet bɪˈhaɪnd/

1.
tertinggal, terlewat
to fail to make enough progress or to be late with something
:
•
I've got behind with my work.
Saya tertinggal dalam kerja saya.
•
If you miss a few classes, you'll soon get behind.
Jika anda terlepas beberapa kelas, anda akan segera tertinggal.
2.