Not good, not up to the task, not true. Originally a UK schoolboy slang expression: "a pile of pants", presumably the equivalent of dirty, smelly washing. Later spread to adults and abreviated.
"It doesn't work. It's just a pile of pants!" or "I don't like that group. Their music is pants" cf "balsa" and "a piece of balsa".
By R. Clayton Jr
those things covering your lower extremities, that are always chafing and uncomfortable. It's probably best to remove them.
Dude, these pants are constricting! Good thing it's Pantsless Day in the office! Freedom for the pasty flesh!
By ranger bill
In Canada, it is a codeword of heroin.
Hey man, could you hook me up with some pants?
By Jeffboyo
Woefully inadequate. Useless. A waste of time and space.
His performance was pants. This is pants.
By Billy Shears
What I wear on my head to amuse my chums and associates.
"Will sir be wearing his pants on his head today?" - My Butler
By Bastardized Bottomburp