and that ain't hay
(and) that ain't hay
And that's significant. Often used in reference to an amount of money. He got a $5,000 bonus this year, and that ain't hay.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
and that ain't hayAMERICAN, INFORMAL
People say and that ain't hay after an amount of money to emphasize that it is a large amount. For 13 out of the last 20 years Canadian bonds produced returns of more than 10%, and that ain't hay.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012