behind the curve
US /bɪˈhaɪnd ðə kɜrv/
UK /bɪˈhaɪnd ðə kɜrv/

1.
tertinggal, ketinggalan zaman
lagging behind current developments or trends; not up-to-date
:
•
Our company is behind the curve when it comes to adopting new technology.
Perusahaan kami tertinggal dalam hal mengadopsi teknologi baru.
•
If you don't keep learning, you'll quickly find yourself behind the curve.
Jika Anda tidak terus belajar, Anda akan segera menemukan diri Anda tertinggal.