the condition that occurs when one makes a call and is preoccupied, so when the recepient picks up the phone the caller momentarily forgets who they are calling
(ring ring)

Me: hello?
Caller: oh...um...who is this?
Me: what?
Caller: oh wait sorry i just had a case of phone amnesia.
by johnbob06 August 7, 2008
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When you are in a call and get a call waiting signal. You answer the call waiting signal and totally forget your original caller. After you end call, the cell phone rings back from original caller.
Girlfriend 1 calls.
while talking. girlfriend 2 calls in.
You answer and leave GF 1 on hold.
You end call from GF 2.
Cell phone rings back from GF 1 who is now pissed cause you got cell phone amnesiaon her!
by Truckpipe770 January 4, 2009
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