Top definition
Totally buried (by flab) abdominal muscles in the configuration of a back pack. The exact opposite of a “six pack,” the definition of which is: “Well defined abdominal muscles in the configuration of a six pack of canned drinks.”
A uni pack could be described as: “Undefined abdominal muscles in the configuration of a two-liter bottle of Coca Cola carried in a school back pack that is already full of homework.”

Used by Jillian Michaels on 'Rachael Ray' 11/15/2011.
"Oh man, Bert's sure missing a six pack."
"Yeah, but he's not missing his uni pack." (snickers)
by =DSA. November 15, 2011
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug