This is just for kicks and grins, but I somehow got onto the subject of catchphrases with my kids and decided to give them a perfect example of one: Dr. McCoy's famous - and famously parodied - line from the series Star Trek: "He's dead, Jim." And it's perfectly captured in the clip below.
Frankly speaking, no matter how many times I watch this, it's still hilarious. I often wonder if the writers would have changed that line if they could have seen into the future. Regardless, I think it's great that their work gets to entertain us on two fronts: a show that's still fun to watch almost 50 years later, and a memorable catchphrase that's likely to live forever.