1997, 6 April, emesone username, re:somebody needs an education, Don't they see the oxymoronicness of bitching on and on and on how they care not about what I post?
1998, Harry Levy, Chain of Custody, Fawcett Crest (1999), ISBN 9780449004494, page 163:All I remember saying is, "My pleasure," and being struck by its oxymoronicness.
2001, Steve White, Family Vacations & Other Hazards of Growing Up, Chloe Press (2001), ISBN 9780967909288, page 19:The oxymoronicness (deluded writers are allowed to make up stupid words) of vacation with your family is also affected by Variable 2: Your own Personal Irritation Factor.