whop·ping /ˈwɒpɪŋ $ ˈwɑː-/ adjectiveadj [only before noun] informal whopping• a whopping 28% increase• The second day went through the roof with a whopping 573,604.• He managed to get a TV celebrity to open the theatre -- but at a whopping fee.• The Department of Social Security admitted it was paying their whopping mortgage to stop the mansion being repossessed.• In the divorce proceedings, she demanded the car and a whopping two-thirds of the family business.