It's an adjective for something that's bad. It could be easily subbed in a sentence for bad or shit, but it's a much cooler way of saying it.
Andy: " Yo Josh, how did your exams go?
Josh: " They went really bad, not gonna lie"
Andy: " Shit bro, that's pretty penis in the sack"

Nic: "weather is a bit penis in the sack today"
by penile_eshay August 11, 2022
Get the Penis in the Sack mug.
A term used to describe a godly figure and an acsended being
Person1: "Hey Greg, wanna go watch a mov...."
Person2: "Don't speak to me mortal I have become penis ball sack
by Shovel_n_spade_wade November 5, 2019
Get the penis ball sack mug.
An extra flap of skin hanging off of the penis possibly containing puss.
by Leagerlog May 5, 2009
Get the Penis-Sack mug.
Where a whole bunch of dudes get a paper bag and put their dicks in the bag while jacking off.
"Hey bros! We should stop playing gamecube and do a penis sack."
by Teamrubert July 12, 2008
Get the Penis Sack mug.