L.B.D.F.
Making a big show of doing nothing. You’re all bluster and no results.
He’s L. B. D. F. He’s waving his arms like he’s conducting an orchestra of failures.
She’s L. B. D. F. She’s arguing with the ceiling like it stole her lunch.
They’re L. B. D. F. They’re shouting at the computer like it’s the enemy.