Flatwalling

When someone prevents you from doing something either physically or metaphorically from going any further with your intended endeavours or intentions.

E.g. 1. Yeah, she really wanted that Saturday Job at the Ice Cream Parlour but then her Parents flatwalled her by grounding her on the day of her interview just so she couldn't get the Job - unbelievable!
E.g. 2. Without her parents signing her grant form she won't be able to go to University and they won't do it because they don't want her to go. However, she's smart so she'll find a way around that flatwalling.