2-ply
Short way of saying: "More expensive" Toiletpaper. 2-ply standing for 2 layers. Commonly cheap versions of toiletpaper (or paper towels or whatever) are made of 1 layer of paper. More expensive, luxury versions are made up of 2 or up to 3 layers. Respectively 2-ply or 3-ply
In this economy it's hard to balance money to be spend on daily needs and groceries in general. Because of that we had to switch from the comfortable 2-ply toiletpaper to the cheaper 1-ply. Another $3 a month saved.
2-ply
The action of using a second Kleenex to clean semen after masturbation.
Kyle: "Man that was a big load, I need to 2-ply that bitch."
2-Ply Landing Strip
Practice by which a male during masturbation pulls a length of toilet paper from the roll just before the point of ejaculation without tearing off the piece, thereby creating a "landing strip" for his semen to land on.
"The other day I tried to make a 2-Ply Landing Strip, but I over shot and my boys crashed into the wall."