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1.
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.
by Roger Halunen January 19, 2006
 
2.
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.
by Shaners iroc January 28, 2011