Wordnet 3.0
VERB (1)
1. 
 drink down entirely; 
- Example: "He downed three martinis before dinner"- Example: "She killed a bottle of brandy that night"- Example: "They popped a few beer after work"[syn: toss off, pop, bolt down, belt down, pour down, down, drink down, kill]
WordNet (r) 3.0 (2006):
belt down
    v 1: drink down entirely; "He downed three martinis before
         dinner"; "She killed a bottle of brandy that night"; "They
         popped a few beer after work" [syn: toss off, pop,
         bolt down, belt down, pour down, down, drink
         down, kill]