draw the line at
Refuse to go any further than, as in I draw the line at giving them more money. This expression alludes to a line drawn at a stopping point of some kind. [Late 1700s]
Words nearby draw the line at
draw slide, draw straws, draw table, draw the curtain, draw the line, draw the line at, draw top, draw up, draw weight, draw-gate, draw-loom
The American Heritage® Idioms Dictionary
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