The Collaborative International Dictionary of English v.0.48:

Drub \Drub\ (dr[u^]b), v. t. [imp. & p. p. Drubbed; p. pr. &
   vb. n. Drubbing.] [Cf. Prov. E. drab to beat, Icel. & Sw.
   drabba to hit, beat, Dan. dr[ae]be to slay, and perh. OE.
   drepen to strike, kill, AS. drepan to strike, G. & D. freffen
   to hit, touch, Icel. drepa to strike, kill.]
   To beat with a stick; to thrash; to cudgel.
   [1913 Webster]

         Soundly Drubbed with a good honest cudgel.
                                                  --L'Estrange.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Drub \Drub\, n.
   A blow with a cudgel; a thump. --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

drub
    v 1: beat thoroughly and conclusively in a competition or fight;
         "We licked the other team on Sunday!" [syn: cream, bat,
         clobber, drub, thrash, lick]