Pants

For those who are following, or at least sort of following, the World Cup, I highly recommend this guy's daily updates. Not only are they quite amusing, but I've also learned something from them. Specifically, the use of the word "pants" as an adjective (as in "England are pants"). Near as I can tell, something that is "pants" is bad (and if you've followed the ongoing saga of my manpris, you might appreciate that one of his categories of "pants"-ness is "THOSE GIRLY CAPRI PANTS THAT YOU SOMETIMES SEE GUYS WEARING"). How have I gone through life not knowing this?