It's quite simple. Grab your Websters and open it randomly to any page. If you notice, at the top of the page there are words which show what is represented on the page below from start to finish.
Some of these can be quite funny when you put them together.
I used to play this "game" with a co-worker; we'd always flip open the dictionary randomly and come up with something funny. It was a bit of comic relief from a stressful tech job where everything must be exact and precise. Or maybe you just had to be there...
Anyway, give it a try. Open your dictionaries at random... No fair seeking funny things out, sometimes the stuff that comes up isn't funny, okay? Get over it and just try again