/ Dictionary / Index B bonkers: Meaning and Definition of Find definitions for: bon•kers Pronunciation: (bong'kurz), [key] — adj. Slang. mentally unbalanced; mad; crazy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bonkers (Thesaurus) bonk bon marché* Related Content Daily Word Quiz: industrious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language