's as lumpy as two-day old porridge 
(ROOT (VP (VBZ 's) (ADJP (ADJP (RB as) (JJ lumpy)) (PP (IN as) (NP (ADJP (NP (CD two) (HYPH -) (NN day)) (JJ old)) (NN porridge))))))
(ROOT (VP (VBZ ) (ADJP (ADJP (RB ) (JJ )) (PP (IN ) (NP (ADJP (NP (CD ) (HYPH ) (NN )) (JJ )) (NN ))))))