Top Definition
When a particular person becomes very angry over someone or something while swimming.
Josie is swimming in the fast lane of the pool, she has to stop because two old ladies have stopped to chat in the fast lane. This causes Josie to develop Swimrage, she then shouts at them quite loudly outlining the particular dislike she has for them causing them to promptly move out of her way.
by TheDreamMaker November 18, 2011

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