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5.
Also known as B*ckch*t, mainly by Ziners.
Sad domain populated by losers who need to have their opinions validated by the mysterious "Ed"
B*ckch*tter:"I like Mcfly. Am I the only one?"

ME:"FOOL! BW HA HA...etc"
by Skeletal Munchkin February 11, 2005
 
1.
To respond to an order in an argumentive fashion.
I told her to clean up her room, and she backchatted me, so I grounded her for a week.
by Sabretoof May 13, 2008
 
2.
Laughably teen magazine service on BBC Ceefax Page 577 - mainly due to its laughable content and embarrassingly self-conscious coolness. Any reference to this taboo subject should be as B*ckch*t.
Reading B*ckch*t is like having an enema, only with Super Noodles instead of water.

Bob: Did you see B*ckch*t yesterday?
Kev: Yeah, man! Busted are the best!
Bob: *smacks Kev round the head with pinking shears*
by ANBY June 17, 2004
 
3.
The process of two people talking to one another and continuously going back to answer the other person's questions. This usually occurs during instant messaging sessions when two people ask a question at the same time.
I met this girl on Chat Roulette. She was really cool, but we back-chatted for like 20 minutes.
by Tyler Brach February 20, 2011
 
4.
word used by neds in place of arguing
WATCH the back chat or go in to the hall
by David Richardson March 04, 2005
 
6.
To read back through a chat box to get all the gossip one missed while away.
Simon always back-chats, so you can never talk about him on the IRC without him knowing.

I back-chatted late night and got to read the hottest lesbo cyber porn ever.
by CyAdora July 06, 2008