/ Dictionary / Index J jackass penguin: Meaning and Definition of Find definitions for: jack'ass pen"guin Pronunciation: [key] any of several boldly marked black and white penguins of the genus Spheniscus, esp. S. demersus, of southern Africa, with a call resembling a donkey's bray. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jackass gunter jackass rig Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language