Winter Balls

When your balls are cold and tighten up. Can be any time of year, but usually during the winter. This is as opposed to warmer environments, when your balls are big, loose, and swinging.

Jake: "Bro, it's cold as hell out here!"
Chad: "Fr man, I got a serious case of winter balls right now."
Jake: "I miss the summer when my balls were big."
Chad: "ong"