A figure of speech, on the
average, meaning:
1. I'm gonna
blow you off.
2. I'm gonna ignore you.
This is mainly derived from being stood up or lied to by the caller that
ends a conversation with you over the phone by saying "Im a call you back" and really won't, especially if the caller don't care about his/her word. The reason is always unknown unless you're absolutely sure of why.
NOTE: It's not always intentional.