pigwash
/ˈpɪɡwɒʃ/noun
Kitchen or brewery refuse and scraps (especially in liquid form) used as food for pigs, pigswill; (in extended use) any liquid of inferior quality, as cheap beer, etc. Also figurative : rubbish, nonsense.
Origin
Early 17th century; earliest use found in Thomas Dekker (c1572–1632), playwright and pamphleteer. In some forms from the genitive of pig + wash. In some forms re-formed from pig + wash.