Ones house(Possibly yours...?) or general area that has little to no cell signal.
Shere Khan(Yes, from Talespin.): This place is such a f*cking Cell Hole! I can't get one damn bar on my Motorola MicroTAC 9800X!?
Kevin Sorbo: Well it's not my fault I had to move back to my parents basement, you should of spent less time molesting Kit Cloudkicker more time with me and Eolis pushing the VHS box set of Hercules: The Legendary Journeys...
Shere Khan: Whelp, I can't argue with facts.
A person using a cell phone while being completely oblivious to their surroundings, other people, or tasks requiring full and immediate attention.
I watched a Cellhole weave dangerously in and out of traffic without using any turn indicators.
While navigating the store the Cellhole was compiling a verbal shopping list.
The ring tone in the theater indicated there was a Cellhole in the audience.
Just when the entrée arrived a Cellhole at the table next to ours decided to have an argument with his girlfriend.