Meaning of 笈負 in Japanese

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Definition of 笈負

ふ(fu) 【負】

おい(oi) 【笈 ·負】

(n) wooden box carried on one's back to store items for a pilgrimage
あ、あれ？なんか・・・すっごい負のオーラを感じますよ？
E-eh? I somehow seem to feel a very threatening aura...