DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   mayo /mˈeɪəʊ/
    [coll.] Mayonnaise <fem>, Mayo <fem> [ugs.]  [cook.]
      Synonym: mayonnaise