noun
Colloquial and somewhat vulgar term for testicles. Used in casual, often male, speech. Not appropriate in formal contexts.
サッカーボールが金玉に当たって、めちゃくちゃ痛かった。
The soccer ball hit my balls and it hurt like hell.
あいつは金玉が小さいから、度胸がないんだよ。
That guy has no guts because he's got small balls.