helmethead Share definition Flag a person who is retarded another form of the word is helmet or helmets plural! My friends are such helmetheads. You guys are being such helmets. dannanananananaBATMAN'S A HELMET! helmethead by Green Lantern and Cat Woman!!! June 22, 2008 0 0 Get merch Get the helmethead mug. Buy Now — $32.95 See more merch