See also: zoo, Zoo, zôo, zōo, zoo-, -zoo, and zoö- <span class="searchmatch">zo'o</span> (attitudinal indicator) used to indicate that something is said humorously...
From <span class="searchmatch">zo'o</span> and bu. IPA(key): /zoˈhobu/ zo'obu A smiley face in ASCII text; ":-)"....