The Oxford Thesaurus An A-Z Dictionary of Synonyms - zoo n.

1) zoological garden, menagerie, Tiergarten, (safari) park: When I was a child, I enjoyed going to the zoo almost as much as I do now. 2) madhouse, mess; chaos, pandemonium, bedlam, Colloq US three-ring circus, Chinese fire-drill: When my husband and the three children get ready in the morning the kitchen is like a zoo.