French knickers are just like everyone else's except they fry them in garlic butter....I distinctly remember the expression 'pants' turning up as being soemthing not particlarly good as in 'That last song was pants' or 'This house believes the philosophies of John Paul Satre were pants' etc etc. Seemed to arrive some time in the 80's around here. Guess 'Pants to whatever' derives from that???
Dave the (always) red nosed Gnome