A Okee-Dokee
A Okee-Dokee is when someone promises to show up but then vanishes like a ghost, leaving everyone else to clean up the mess they made.
'I’ll be there in five minutes... a oke-dokee!' He vanished like he was chased by dogs.
'She said she’d come... a oke-dokee! Then she left me with the dog.'
'He said he was coming... a oke-dokee! Then he went to the mall.'