That word is thrown around a lot, Alanis Morissette being another culprit guilty of its misuse.
Regarding your profile pic, let me pull it up... I was using Webster's 2a - the use of words [in this case an image] to express something other than and especially the opposite of the literal meaning. Now, generally, people use their profile pictures to show something they like, maybe a place, maybe something they do. The straight forward meaning of your use of that picture would seem to be "Hey, check out this cool Hummer roarin' through the desert, yee hah!" but I know that you have, for instance, taken a strong position against people running wilderness trails because of the increased erosion it causes. So I thought you might be using you profile instead to show something you didn't like - like the big impact 4-wheelers like that leave on both our wilderness land and collective air. Anyway, it made me laugh, hopefully with you. :)
I'm glad to hear that you're as well as can be expected given that run of surgeries. A friend of mine, with the healthiest lifestyle of anyone I know, has recently been in and out of the hospital for melanoma that has spread to his lungs - a dark irony. Lung cancer for a man who has never smoked a day in his life. Webster's 3 - an event marked by incongruity between the actual result of a sequence of events and the normal or expected result.