if that's not (something), (then) 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!

See also: if, know, not, what

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.