DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   sup
       n 1: a small amount of liquid food; "a sup of ale" [syn:
            swallow, sup]
       v 1: take solid or liquid food into the mouth a little at a time
            either by drinking or by eating with a spoon