Store code somewhere and call it when needed

[westfw]

@Classified123

char *jokes[]={
  "I'm afraid for the calendar. It's days are numbered",
  "My wife said I should do lunges to stay in shape. That would be a big step forward",
  "Why do fathers take an extra pair of socks when they go golfing? In case they get a hole in one",  
  "Singing in the shower is fun until you get soap in your mouth. Then it's a soap opera",  
  "I only know 25 letters of the alphabet. I don't know y", 
  "What does a sprinter eat before a race? Nothing, they fast"
    };

Storing code other than in the program memory would be troublesome.

However, storing strings like your "jokes" is relatively easy:

1. They could be stored in flash, freeing RAM (RAM is much smaller than flash on most microcontrollers.)
2. They could be stored on an external EEPROM, FRAM, or Serial Flash chip. There are already libraries that will make this relatively easy. Small chips holding up to about 16MB of data are relatively cheap.
3. They could be stored on something like an SD card. I'm not sure of the status of the existing libraries WRT today's "typical" 16-32GB SD card size, but you can usually find older cards in the 64M-2GB range that should work fine.

(larger external storage schemes tend to use a "filesystem" to keep the space organized. Just like your PC.)