Someone that is so thick skulled that you couldn't pound an intelligent idea into thier head with a hammer. A person with no clue how to function in society & therefore is a nuisance to everyone. Boundless incompetence. This word is believed to be derived from the term hilljack.
The ability girls and women have developed to hold several items at once in one hand. The skill has been developed due to the lack of pockets in women's clothing.
I thought she'd need multiple trips to carry her phone, keys, wallet, and Starbucks to her car since she needed the other hand to open the door, but she used her impressive girl grip to carry everything in one hand.