Sweatball

I walked to the front, feeling a sweatball roll down my back, paused, and began.

Source: wiktionary

I tried to give Heather a celebratory hug but she quickly wriggled out of my embrace. 'get away, sweatball,' she said, with an attempt at a laugh.

Source: wiktionary

I'm a sweatball too. A couple general notes on sweating. I believe it is true that /generally/ speaking, men do tend to sweat more than women.

Source: wiktionary

He peeled his work gloves and rubbed his hands compulsively until tiny black sweatballs of grime dropped away like scattered grains of pepper.

Source: wiktionary