Anytime you're cranky with your co-workers or anyone that you come in contact with like a toddler does when fighting sleep.
When you really don't want to be bothered but you still have to deal with people at work.
Phone rings constantly at your job.
Marilyn: I'm so sick of this phone ringing and talking to stupid people!
Barbara: It's no worse today than any other day.
Marilyn: I know I must be toddler nap cranky today.