duffBrE/dʌf/NAmE/dʌf/verbpresent simple - I / you / we / theyduffBrE/dʌf/NAmE/dʌf/present simple - he / she / itduffsBrE/dʌfs/NAmE/dʌfs/past simpleduffedBrE/dʌft/NAmE/dʌft/past participleduffedBrE/dʌft/NAmE/dʌft/ -ing formduffingBrE/ˈdʌfɪŋ/NAmE/ˈdʌfɪŋ/●ˌduffsb↔ˈup(BrE, informal) tohitorkicksbseverely痛击;猛踢;毒打SYNbeat up