doomgloom Share definition Flag adjective: pessimistic in a melodramatic or exaggerated manner; as if doomsday will result from the current problem at hand. Heather was doomgloom over her recent breakup; she acted as if it were the end of the world. doomgloom by kreepyjess February 19, 2009 0 0 Get merch Get the doomgloom mug. Buy Now ā $32.95 See more merch