The episode "the last roundup" where in the end Rainbow dash let rarity and pinkie pie stranded in the desert and Pinkie Pie would constantly talk about Chimicherrychanga's.
Cerry-chinga, chimi-cherry, chuma-chingi, cherry-chuma-chinga, oh, how'bout cherry-chinga-chimi, or mayber chinga-chalatte-chuma. Put that in your head with Pinkie's voice for about an hour and you will understand.