irony (
http://definr.com/irony)
n 1: witty language used to convey insults or scorn; "he used
sarcasm to upset his opponent"; "irony is wasted on the
stupid" [syn:
sarcasm,
satire,
caustic remark]
2: incongruity between what might be expected and what actually
occurs: "the irony of Ireland's copying the nation she
most hated"
3: a trope that involves incongruity between what is expected
and what occurs