lagger-bitch
A lagger-bitch is someone who is always late, like they're fighting a battle against time and losing every day.
She was 20 minutes late to our meeting because she got stuck in traffic. 'I'm a lagger-bitch,' she said.
He missed his train because he forgot to wake up. 'I'm a lagger-bitch,' he moaned.
She showed up to the party after the cake was already eaten. 'I'm a lagger-bitch,' she admitted.