The nervous impatience experienced when waiting for a parcel or package you've ordered to be delivered. Often accompanied by frequent glances at the front door for signs of the courier driver when you hear any audible or visual queues of their presence. Generally the level of pre-parcel anxiety is highly correlated with either the monetary, sentimental or hype-based value placed on the package being delivered.
"After my package wasn't delivered yesterday I've got serious pre-parcel anxiety!"

"10:43am: My package hasn't arrived yet! the courier better not have stole it!"
by waitingForAPackage August 30, 2011