Green’s Dictionary of Slang

a villain whose destination will be the gallows; thus as a term of abuse.

1566		G. Gascoigne (trans.) Supposes III i: I cannot take two steps but I must look back for my younker. — Go to, halter-sick! [sic] If you break one egg I may chance break .
1598		Florio Worlde of Wordes n.p.: Basaro, a shifter, a coincatcher... a haltersacke [F&H].
1611		Beaumont & Fletcher King and No King II ii: Away, you haltersack, you.