draw the line at (doing something)

to decide you will not do something.

I love vampires, but I draw the line at attending some silly Dracula convention.

Where to draw the line on treatment for people who are dying is a decision made by patients, their families and their doctors.

Usage notes: often used to say you will not do something because you think it is wrong: I'm a loyal employee, but I draw the line when I am asked to do something I think is wrong.

• You could have knocked me over with a feather!
• you could hear a pin drop
• you couldn't have asked for anything more
• you couldn't have asked for more
• You could've fooled me.
• You'd better believe it!
• you don't need this
• you have got to be kidding
• you haven't lived
• you haven't lived until
• you haven't lived until something
• You have to be cruel to be kind.
• You have to hand it to
• You have to hand it to someone
• you know
• You live and learn.
• You'll catch death!
• You'll catch death of cold!
• you'll catch it
• You'll catch your death!
• You'll catch your death of cold!
• You'll never hear the end of it.
• You mark my words.
• you may as well
• you may as well do something