Meaning of 爪垢煎飲 in Japanese

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Definition of 爪垢煎飲

あか(aka) 【垢】

(n) dirt; filth; grime
いつもあかだらけで、食事も満足に与えられていない様子でした。
He was always filthy and looked like he wasn't given enough food.

いる(iru) 【煎る ·炒る ·熬る】

(v5r, vt) to parch; to fry; to fire; to broil; to roast; to boil down (in oil)
彼はコーヒー豆をいっている。
He is roasting coffee beans.

つめ(tsume) 【爪】

(n) nail (e.g. fingernail, toenail); claw; talon; hoof
私は夜には決して爪を切らない。
I never cut my nails at night.
plectrum; pick
hook; clasp

く(ku) 【垢】

(n) (Buddh) klesha (polluting thoughts such as greed, hatred and delusion, which result in suffering) →Related words: 煩悩