A sarcastic phrase used to signify that you actually won't call or interact with someone in the future. The phrase implies that you would have
theoretically called them "yesterday" if you really
cared. This phrase is primarily used a means of
blowing someone off.
Jim: So did you
meet up with that girl you got coffee with last week?
Nick: Nah, she
blew me off and never
texted back after. It was an "I'll call you yesterday" type of situation.