hanging out to dry
To make an appointment or plans with someone and then at the last minute make excuses or plans with someone else or blow them off.
Ms. Levesque called me and were set to meet this weekend. But I got another call just today and now she is not feeling well after partying all night. That bitch left me hanging out to dry again!
hang out to dry
to expose someone's weakpoints or vulnerability
at the town meeting next week, the city council is going to hang out to dry the mayor