To counterbalance; to balance out.
To act as counterbalance (against something).
To exhaust; to tire out.
To crash; to fall over (especially in board sports such as surfing, skateboarding, etc.).
To physically erase (writing, computer data, etc.).
To do away with; to cause to disappear.
To destroy (especially, a large number of people or things); to obliterate.
To knock (a surfer) off their board.
To fall off one's surfboard.