The Collaborative International Dictionary of English v.0.48:

Titivate \Tit"i*vate\, Tittivate \Tit"ti*vate\
   (t[i^]t"[i^]*v[=a]t), v. t. & i. [imp. & p. p. Titivated
   (t[i^]t"[i^]*v[=a]t`[e^]d); p. pr. & vb. n. Titivating
   (t[i^]t"[i^]*v[=a]t`[i^]ng).] [Formed from an uncertain
   source, in imitation of words in -ate fr. L.]
   To dress or smarten up; to spruce. -- Tit`i*va"tion,
   Tit`ti*va"tion, n. [Both Humorous]

         "Come here, an' let me titivate you." He sat down
         beside her, and submitted to be dusted.
                                                  --Quiller-Couch.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

titivate
    v 1: make neat, smart, or trim; "Spruce up your house for
         Spring"; "titivate the child" [syn: spruce up, spruce,
         titivate, tittivate, smarten up, slick up, spiff
         up]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "titivate":
   adorn, array, beautify, bedeck, bedizen, belie, blazon, camouflage,
   color, dandify, deck, deck out, decorate, disguise, distort, dizen,
   doll up, dress, dress up, embellish, emblazon, embroider, enrich,
   falsify, fancy up, fig out, fix up, fudge, furbish, garble,
   garnish, get up, gild, gloss, gloss over, grace, gussy up, mask,
   miscite, miscolor, misquote, misreport, misrepresent, misstate,
   ornament, overdress, overstate, paint, pervert, prank, prank up,
   preen, prettify, pretty up, primp, primp up, prink, prink up,
   rag out, redecorate, redo, refurbish, set off, set out, slant,
   slick up, smarten, smarten up, spruce up, strain, trick out,
   trick up, trim, twist, understate, varnish, warp, whitewash