He got excited and pre-cum came out.
Apparently you can get pregnant even from pre-ejaculate.
Standard kanji spelling for this slang term.
Katakana variant, common in casual or manga contexts.
Compound of 我慢 (がまん, 'endurance') + 汁 (じる, 'juice, fluid'), literally 'endurance fluid', referring to fluid released during sexual arousal before ejaculation.