The top dog, the person properly running the show. The head honcho calls the shots, signs things off, and everyone else suddenly remembers to sit up straight. It can be respectful or lightly sarcastic, like you’re rolling your eyes at the whole chain of command. Honestly, it’s the quickest way to say “boss” without sounding corporate.
"I tried to blag a refund and the cashier goes, ‘That’s above my pay grade.’ Next thing I know I’m waiting for the head honcho like I’m about to be grilled by the principal"