a Mallory
When a Mallory vanishes like a fart in a hurricane and shows up late or not at all.
You waited for her at the mall for two hours. She showed up at 10 PM with a pizza and a smirk.
He promised to be there for the concert. He texted ‘I’m a Mallory’ and never came.
She said she’d be there for the meeting. She was at the mall, eating tacos, and forgot about it.