Female version of "pochito" which is a diminutive of "Pocho". First generation US born daughter of Mexican born parents. Usually speaks broken or little Spanish (aka español mocho).
"Y ahí le voy a enseñar, "espanish" a mi pochita" - Los Tigres Del Norte
A Spanish slang word indicative of someone or something being such a failure that the word to describe it is not present in the normal lexicon of Spanish, because that level of failure was thought impossible by the inventors of the language.