draw the line at [sth], draw the line at doing [sth]v exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
figurative, informal (set a limit or restriction)
划界限 huà jiè xiàn
拒绝做 jù jué zuò
I went out for a few beers, but I drew the line at doing shots.