when you talk to someone three different ways at the same time, keeping up the conversation. eg. on facebook, sms, msn, calling them, talking to their face.
steph (facebook) : omgg ssaraah!
sarah (sms) :what!?!
steph (textplus) : we are triangle texting!!!!!
sarah (sms) : aww yeah!
(5 minutes later)
steph (facebook) : wait, what did you say? lets stay on one program, im so confused!
by charmander05 January 12, 2011
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When 3 people silmutaneously text one another, usually about the same topic.
Ashley: Hey guys did you see tht new movie?

Sarah: Yeah Ashley it was great.

Alex:Yeah i liked it. What did you think Sarah?

Sarah:I thought it was awesome. How abotu you, Ashley?
Ashley:Great . Thanks for deciding to Triangle Text.
by cutmeupashley August 23, 2009
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