blowing someone off 

when someone says that they will do something and end up not committing to it

he ended up blowing someone off when he ditched them to GET blown off

synonyms: to cast aside, to throw aside, to ditch, associated with flakiness

blowing someone off by 6969lolz September 29, 2019

blowing someone off 

To fully make plans with someone and to purposely not show up when the other person doesn't have anything planned purposely to blow the other person off

I made plans with my friend and he totally just blew me off. Hence the term "blowing someone off"

blowing someone off by Badboy327 June 29, 2014