hock (n.3)youdaoicibaDictYouDict
"pawn, debt," 1859, American English, in hock, which meant both "in debt" and "in prison," from Dutch hok "jail, pen, doghouse, hutch, hovel." The verb is 1878, from the noun.
When one gambler is caught by another, smarter than himself, and is beat, then he is in hock. Men are only caught, or put in hock, on the race-tracks, or on the steamboats down South. ... Among thieves a man is in hock when he is in prison. [G.W. Matsell, "Vocabulum," 1859]