(n) A sandwich with dog poop in it: Presumably opening said sandwich would resemble a Rorschach inkblot pattern; see Texas Flip-phone.
From Ben Driscoll's Daisy Owl Webcomic 7/9/2008
"Well, she left a surprise in the sandwich. An old fashioned 'Texas Flip-phone.'"
" . . . a what?"
. . .
"A 'Mexican Rorschach?'"
". . ."
"A sandwich with dog poop in it."