The Wayno/Piraro Bizarro collabo from the 9th:
(#1) If you’re puzzled by the odd symbols in the cartoon — Dan Piraro says there are 2 in this strip — see this Page. Meanwhile, the pie segments run through the flavors in the order named, clockwise from the pumpkin segment at the top.
Transpositional wordplay of an especially simple sort, involving a two-word expression, with X Y ~ Y X — in this case taking off from a conventional N + N compound, the metaphorical pie chart ‘chart resembling a pie’, and reversing the parts to yield the novel, and entertaining, (also metaphorical) compound chart pie ‘pie resembling a chart’.
The model expression pie chart refers to an object familiar in our culture, while the play expression chart pie refers to something novel and surprising: a pie made up of segments drawn from various different pies. Not a combination or mixed pie, like the familiar strawberry rhurbarb pie — a kind of hybrid pie — but instead a composite (‘made up of various parts or elements’ (NOAD) or chimerical pie, with distinct parts taken from different pies. (On chimeras, see my 11/13 posting “The chimera of Faneuil Hall”.)