Colloquial and somewhat vulgar term for testicles. Used in casual, often male, speech. Not appropriate in formal contexts.
The soccer ball hit my balls and it hurt like hell.
That guy has no guts because he's got small balls.
Written identically as 金玉, the reading きんぎょく means 'gold and jewels' while きんたま is a colloquial word for testicles, so the reading must be judged from context.
counter for small objects; counter for pieces · counter for military units · individual; one person · counter for years of age difference; counter for school years
scrotum; ball sack
Standard kanji spelling; literally 'gold balls'.
Katakana spelling, often used for emphasis or in manga.
Kana spelling, common in casual writing.
Compound of 金 (kin, 'gold') and 玉 (tama, 'ball'), literally 'gold balls'. The exact origin is uncertain, but it is a euphemistic or humorous reference to the shape and value.