if that's not (something), (then) I don't know what is
Used to indicate that something is very clearly or obviously a genuine instance of something else. I'm offering a brand new washing machine for just $300! Come on, if that's not a great bargain, I don't know what is! This girl is willing to move to Alaska with you? Well, if that's not love, then I don't know what is. If that's not nepotism, I don't know what is. I didn't get the job because the CEO hired his daughter!
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.