snap one’s cookies
snap (one's) cookies
dated slang To vomit, especially violently or profusely. With the way that boat was rocking back and forth, plenty of people spent the whole trip snapping their cookies over the side of the rails. I tried not to snap my cookies at the sight of so much blood.
snap one’s cookies
tv. to vomit; to regurgitate. Some jerk snapped his cookies on the sidewalk.