The act of becoming both sweaty and angry at the same time.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

For swimmers, it is when you haven't swam in a while so you get angry as a result.

When you get so angry that you begin sweeping the walls.

When a person is angry and develops swagger as a result of this, they become swangry.