noun
brokerage; mediation; fencing (stolen goods)
Legal term for acting as an intermediary in transactions, especially in the context of handling stolen property. The 'fencing' sense is a specific criminal application.
彼は盗品の牙保で逮捕された。
He was arrested for fencing stolen goods.
牙保罪は刑法に規定されている。
The crime of fencing is stipulated in the Penal Code.
The term 牙保 is composed of 牙 (ga, 'tusk; fang') and 保 (ho, 'protect; guarantee'). The exact derivation is uncertain, but it is a specialized legal term for brokerage or fencing.