Keywords: obstacle, brick wall (obstacle)
1. Of a person, the action of repeatedly going up close to or hitting a large flat object, such as a wall or obstacle, or any action or any object directly or indirectly associated with this, especially playing close to the net in tennis.
As a Verb or Adjective
1. Of a tennis player, to play close to the net.
2. Of a person, to come across an obstacle crated by a physical barrier or a barrier which is social or psychological that stops you doing what you want. Idiomatic English = hit a brick wall.