[1] : The Collaborative International Dictionary of English v.0.48

chitchat \chit"chat\, n. from chat, by way of reduplication.
   familiar or trifling talk; prattle.
   1913 webster
see also:
chat 

[2] : WordNet (r) 2.0

chitchat
     n : light informal conversation for social occasions syn: small
         talk, gab, gabfest, gossip, tittle-tattle, chin-wag,
          chin-wagging, causerie
     v : talk socially without exchanging too much information; "the
         men were sitting in the cafe and shooting the breeze"
         syn: chew the fat, shoot the breeze, chat, confabulate,
          confab, chatter, chaffer, natter, gossip, jaw,
          claver, visit
     also: chitchatting, chitchatted
see also:
small talk gab gabfest gossip tittle-tattle chin-wag 
chin-wagging causerie chew the fat shoot the breeze chat 
confabulate confab chatter chaffer natter 
jaw claver visit chitchatting chitchatted 

[3] : Moby Thesaurus II by Grady Ward, 1.0

33 moby thesaurus words for "chitchat":
   babble, back-fence gossip, backchat, beauty-parlor chitchat,
   cackle, chat, chatter, chitter, chitter-chatter, clack,
   cocktail-party chitchat, gabble, gossip, gossiping,
   gossipmongering, gossipry, groundless rumor, idle chat, idle talk,
   newsmongering, piece of gossip, prattle, small talk, story,
   table talk, tale, talebearing, taletelling, talk, talkee-talkee,
   tattle, tea-table talk, tittle-tattle

Chitchat >> C Words
Chitchat, definition of term: Chitchat
chitchat_pag1.html