1. treat someone in an inconsiderate or disrespectful manner
don't let somebody walk all over you
If you 'walk over someone', you behave in a way that shows no respect for someone's feelings or which forces them to do what you want. This phrase implies that there is a difference in power between the people involved. This is quite a casual expression that is more often used in social contexts. You may also hear the expression 'walk all over someone'. Similar in meaning to 'exploit', 'take advantage of' or 'to manipulate someone'.