This happened at school one day. One of my lesser intelligent friends (Lophiomyinae, you should be able to guess who) didn't know what ironic meant, so she asked me. The thing is, I'm no good at explaining things so I struggled for an answer. There was a dictionary lying on the table so I used. I swear that's what the definition is! (Okay, it's not exactly the same, the true definition is "of, characterized by, or using irony", but what I used is more simple.)
...
It never acurred to me to look up the word "irony".