When one goes to a farmers market or large supermarket with the intention of buying large quantities of long, skinny, withered looking cheap carrots. The soul intention of this purchase is not to make a stew or soup, but to place the carrots up one's rectum for self pleasure. Each carrot needs to be placed in the garbage after one use, hence why large quantities are purchased.
"Hey Stuart whats with that large bag of carrots you have just bought?. Are you making a lovely carrot soup this evening?"
"No Steve, these carrots are not of a high quality, so soup is out of the question. I have bought these to I can insert them in my bottom"
"Ohh I see, I must remember to get some Arse Carrots myself when I am next at the Supermarket"
A fine specimen of a man who has a crippling addiction and soft spot for his orange, crunchy, snack. These types of people also usually have orange hands, feet, lips, eye balls, and arm pits on account of their carrot overdose.
When you are on stage, but in the background or off to stage left or right and are supposed to be carrying on a whispered/background conversation you continue to repeat "peas and carrots" to each other so the audience sees the lips moving, and can hear the psst-pssts, but cannot understand what you are saying.
Mailman: "peas n carrots peas n carrots peas n carrots peas n carrots" <looks over to Mr Bernard at stage center>
Mrs. talkstoomuch: "peas n carrots peas n carrots peas n carrots peas n carrots" <places hands on hips>