What does the phrase '(подрезал тебя)' mean in the context of the story?

The phrase '(подрезал тебя)' is in Russian and translates to 'cut you off' or 'ran you over'. In the context of surfing or a similar sport, it means Brian's action of coming at Nick with his board blocked Nick's path or interfered with his ride in a dangerous manner, leading to the collision.