"Dry heaves" refers to the act of vomiting or retching without any actual substance coming out. It is when your body tries to vomit, but only stomach acid or air is expelled. Full definition
IT started with dry heaving, then pain and headaches, ending with a man in hospital with a temporary brain condition. (news.com.au)
At no point in this Godforsaken experience of losing a 25 - point lead in the Super Bowl have I stopped loving the things about this lampooned, derided sports team that makes a grown man dry heave in anger. (sbnation.com)
Of all the above - listed causes of dog dry heaving, gastric dilation - volvulus is most likely to become fatal the fastest. (dogdojo.org)