When a phone company is not able to transfer old phone numbers to a new cell phone and you deliberately do not enter certain numbers in the new cell phone.
A - Hey, what's going on?
B - Who is this?
A - This is Mike.
B - Oh sorry. I dephoned you when I got my new cell phone.
B - Who is this?
A - This is Mike.
B - Oh sorry. I dephoned you when I got my new cell phone.
by lifeduzt May 28, 2010

by uttam maharjan July 07, 2012

An adjective given when someone has mistakenly made themselves look dumb by saying something abnormally stupid in a conversation. Someone who disrupted, or killed, the conversation with a bad joke or comment.
by Maddie M. November 28, 2007

To kill an otherwise good conversation with an abnormally stupid or unecessary comment that is not in any way relavent to the conversation.
(May be used as an adjective, ei; to be dephonicated by killing the conversation)
(May be used as an adjective, ei; to be dephonicated by killing the conversation)
"OMG dave get out of here, you are so dephonicated!"
"OMG DAVE you just completely dephonicated our conversation!!!"
"OMG DAVE you just completely dephonicated our conversation!!!"
by Maddie0020 January 15, 2008
