The Collaborative International Dictionary
Minute-jack
Minute-jack \Mi*nute"-jack`\, n.
A figure which strikes the hour on the bell of some fanciful clocks; -- called also jack of the clock house.
A timeserver; an inconstant person.
--Shak.
Wiktionary
minute-jack
n. 1 A figure which strikes the hour on the bell of some fanciful clocks; Jack o' the clock. 2 (context obsolete English) A timeserver; an inconstant person.