Misappropriation with

ネコババ means keeping something one found instead of returning it. It can also mean concealing one’s wrongdoing.

Usage Notes

It is often used when one finds a dropped item and keeps it for themselves, rather than turning it in to the police or a lost-and-found center on the premises.

ネコババ is a noun. When used as a verb, it becomes ネコババする.

Further Reading

Examples

Misappropriating the confessional with ネコババ

Learn the meaning and usage of the vocabulary ネコババ in Japanese, with examples from manga.
怪盗セイント・テール » Volume 7 » Page 34

After Meimi makes her first appearance as a magical thief, her nun-in-training classmate Seira suggests the name Saint Tail. She adds that they can use the sealed confessional as a meeting room.

芽美(めいみ):
「ちょっと それってざんげ(しつ)ネコババするんじゃ……!!」
“Hold up, isn't that misappropriating the confessional?”
聖良(せいら):
「これも すべて(しゅ)の おみちびきですわ」
“This, too, is all part of the Lord's plan.”