noun, noun which may take the genitive case particle 'no'
pure; genuine; trueborn; natural-born
Emphasizes that someone or something is 100% that thing by origin or nature, not mixed or acquired. Often used with identity nouns like 江戸っ子, 日本人, 職人.
彼は生粋の江戸っ子だ。
He is a trueborn Edokko.
生粋の職人気質で、手抜きは一切
With a genuine craftsman's spirit, he never cuts corners.
The kanji 生 (life, birth) and 粋 (pure, essence) combine to suggest 'pure from birth'. The reading きっすい is a native Japanese word; the exact historical derivation is uncertain.