give somebody an inch
US /ɡɪv ˈsʌm.bɑː.di ən ɪntʃ/
UK /ɡɪv ˈsʌm.bɑː.di ən ɪntʃ/

1.
memberi sedikit mengambil banyak, memanfaatkan kebaikan kecil
to allow someone a small amount of freedom or advantage, which they then try to exploit to gain much more
:
•
If you give him an inch, he'll take a mile, so be firm with your boundaries.
Jika kamu memberinya sedikit saja, dia akan mengambil banyak, jadi tegaskan batasanmu.
•
My boss is very strict because he knows if he gives us an inch, we'll slack off.
Bos saya sangat ketat karena dia tahu jika dia memberi kami sedikit saja, kami akan bermalas-malasan.