To be Frank, I'd have to change my name.
Why this joke works
An Honest Introduction Changes Identity
“To be frank” usually introduces an honest opinion. The speaker instead hears Frank as a person’s name and concludes that becoming Frank would require a name change. The sentence promises candor but delivers a little identity puzzle. Let the opening sound like a serious admission, with a short pause before the rest. Capitalizing Frank in writing helps readers notice the name without changing how it sounds aloud.
A closer look
A Closer Look
This line depends on who tells it. A person already named Frank would not need the proposed change, so the literal explanation stops making sense. For everyone else, the joke offers a harmless way to interrupt an overly serious introduction. It works best before an opinion, rather than after someone has asked for sincere feedback.
Fact behind the joke
Fact Behind the Joke
Besides its adjective meaning honest, frank is also a postal verb. Cambridge uses it for marking a stamp against reuse or marking an envelope to show postage has been paid. That separate dictionary sense is not needed for the punchline, but reveals another everyday job for the same small word.