While I like to think of myself as witty, my humor tends to be more sarcastic* than actual wit. I did have a good one-liner today, though.
Me: What's your Karneval costume going to be?**
Coworker: You probably won't recognize it; I'm going as a German DJ
Me (not missing a beat): So, you're going to suck, then?
* And bitter
** This question and its response is roughly 84% of pre-Karneval conversation at work this week