ironical
adjective
characterized by often poignant difference or incongruity between what is expected and what actually is
“madness, an ironic fate for such a clear thinker”
“it was ironical that the well-planned scheme failed so completely”
Synonymsironichumorously sarcastic or mocking
“dry humor”
“an ironic remark often conveys an intended meaning obliquely”
Source: WordNet 3.1, Princeton University