I am an English teacher, so occasionally I'm allowed to do this: Here's a lesson about irony.
When Alanis Morrisette sang, "It's like rain on your wedding day," or waxed on about "black flies in Chardonney," it was not, in fact, ironic. These two examples are unfortunate. Perhaps, in the words of my friend Josh, these examples may be "Alanic," but they are not ironic.
Wikipedia, in itself an odd choice for an English teacher, (for it is not the most credible of sources), explains that, "Situational irony is the disparity of intention and result: when the result of an action is contrary to the desired or expected effect. Likewise, cosmic irony is disparity between human desires and the harsh realities of the outside world (or the whims of the gods)."
Therefore, for your enjoyment, I present to you an example of situational irony:
Unless I'm wrong. If I wrote an entire pretentious, pedantic post defining irony incorrectly....that, by definition, would be ironic.
A little too ironic.
Don't you think?