Verb
toe the mark (third-person singular simple present toes the mark, present participle toeing the mark, simple past and past participle toed the mark)
Alternative form of toe the line
This time if you want me to come back, it's up to you. But remember I won't allow the things you used to do. You're gonna have to toe the mark and walk the line; This time will be the last time. Waylon Jennings
I grew up under demanding people, that demanded things from you, expected you to toe the mark. Bill Parcells