Thick As Oatmeal Share definition Flag A girl or guy who isn't fat, but a little bit chubby. Usually a healthy appearance that is attractive. Damn.... that girl is Thick As Oatmeal. Thick As Oatmeal by Paulbigtoebunyon February 25, 2019 0 0 Get merch Get the Thick As Oatmeal mug. Buy Now — $32.95 See more merch