The Collaborative International Dictionary of English v.0.48:

factotum \fac*to"tum\ (f[a^]k*t[=o]"t[u^]m), n.; pl. factotums
   (-t[u^]mz). [L., do everything; facere to do + totus all :
   cf. F. factotum. See Fact, and Total.]
   A person employed to do all kinds of work or business; a
   person with many different responsibilities. --B. Jonson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

factotum
    n 1: a servant employed to do a variety of jobs