bajillionth \ bə-ˈjil-yən(t)th \ adjective
CW had already announced that its reality series “America's Next Top Model” was coming back for a bajillionth season. — Lisa de Moraes, Washington Post, 4 May 2012
First Known Use of bajillion
1992, in the meaning defined above
History and Etymology for bajillion
Dictionary Entries near bajillion