if that's not (something), (then) I don't know what is(redirected from if that's not something I don't know what is)
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!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.