Do you feel Crabby?

Little Chauncey woke up from a late afternoon snooze yesterday. Big Chauncey asked him if he was feeling a little "crabby" from his nap.
Little Chauncey said, "yeah, I am feeling a little crappy, sometimes when I wake up I feel crappy, and soometimes when Jack and Kate wake up from thier naps they feel crappy too."
I was laughing hysterically. he had no idea why!