overstep the markOFFENDto offend someone by doing or saying things that you should not do or say 言行过分 She overstepped the mark and lost her job. 她的言行太过分，结果丢了工作。
overstep the mark• Helen shrugged; she felt mildly embarrassed, as if she had overstepped the mark.• In either case an agent trying to influence Fontaine may have overstepped the mark.• The preacher overstepped the mark when he called the Royal Mail to a halt on the moor near Bagshot.
→ overstep the mark at overstep(2)