draw the line

US /drɔ ðə laɪn/
UK /drɔ ðə laɪn/
"draw the line" picture
1.

一線を引く, 限界を定める

to set a limit on what one is willing to do or accept

:
I don't mind helping you, but I draw the line at lending you money.
手伝うのは構わないが、お金を貸すのは一線を超える
You have to draw the line somewhere, or people will take advantage of you.
どこかで一線を引く必要がある、さもないと人々に利用されるだろう。