消しょう魂こん

Meanings

noun, noun or participle which takes 'suru', intransitive verb

losing energy; being exhausted

rare term

Rare literary term for a state of emotional or physical depletion, often from sadness or grief. Can be used as a noun or with する.

noun, noun or participle which takes 'suru', intransitive verb

being absorbed; being immersed

rare term

Rare literary term for being deeply engrossed in something, to the point of losing oneself. Can be used as a noun or with する.

消しょう耗もう
消耗 is a common word for physical or mental exhaustion, while 消魂 is a rare literary term with a nuance of emotional depletion.
没ぼっ頭とう
没頭 is a common word for being absorbed in something, while 消魂 is a rare literary term implying a deeper, almost trance-like immersion.

The exact derivation is uncertain; the kanji 消 (extinguish) and 魂 (soul) suggest a state where one's spirit is extinguished or absorbed.