off your oats
off (one's) oats
old-fashioned Disinclined to eat; having little or no appetite. Mrs. Bailey said you were off your oats, sir, so I brought you some chicken broth to keep your energy up.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
off your oats
lacking an appetite. informalFarlex Partner Idioms Dictionary © Farlex 2017