noun
taking an object hostage
Jocular coinage modeled on 人質 (hostage), treating an object as if it were a hostage. Used humorously when someone withholds or seizes an item to gain leverage.
See also: 人質
スマホをモノ質に取られて、仕方なく言うことを聞いた。
They took my smartphone as a hostage, so I had no choice but to do what they said.
彼は私の財布をモノ質にして、謝るまで返さなかった。
He held my wallet hostage and wouldn't give it back until I apologized.