I've always thought that "plonk" was a corruption (deliberate as we are english, and get some fun out of misusing words!), for "vin blanc". But we do use "on the piss" to mean drinking excessively; and again, to mean "not standing up straight"; although more of things than people. And the derivation of "piste", although now associated with skiing, is from the latin from "beaten" (as in "the beaten track") or "stamped" (like a coin), ie "hammered", so the common connotations are fairly old.