The pervibial "pants" one wears when becoming a bit too intoxicated. However, drunky pants can also lead to wearing naked pants, then walk-of-shame pants.
Pants that are normally worn for comfort or relaxation (usually grey). They are so comfortable that the wearer often mistakes the material for Koala fur/skin. People wearing such should not be disturbed.
"Hey, I was going to ask if you wanted to go for a ten mile run, but I see you're wearing Koala Pants, so I'll come back at a better time"
Also known as Spanish breeches, these types of hose or pantaloons with pleats and open slits were worn chiefly by men during the seventeenth century, but are now only worn by cosplayers or employees at Renaissance fairs today.
Girl 1 at Renaissance fair: "Hey, do you see that guy over there wearing the pantaloons?"
Girl 2 at Renaissance fair: "You mean the one with the pumpkin pants?"
Girl 1 at Renaissance fair: "Uh huh. He's got sexy legs."
Girl 2 at Renaissance fair: "Gross!"