“
Lunfardo is frequently found in the lyrics of tangos, supplying nuances and double-entendres with overtones of sex, drugs, and the criminal underworld. Lunfardo is, for all practical purposes, unintelligible to an average Spanish-speaking person from any other country.
—wikipedia


— “The Dagger” by Jorge Luis Borges
What was that thing about the book of poetry and the stiletto?
that’s the post about the sevillana. if you follow the link in that post there is a picture of the switchblade and the book of poems.