What is the meaning of falla?

Answer 1

Manuel de Falla 1876 to 1946. was a Spanish composer his music is heavily based on folk song traditions and Spanish exoticism, well known for "Nights in the Gardens of Spain" (1911-1915).

Answer 2

It can either be referring to marijuana ("falla" is "allaf" backwards, which is what weed is referred to in the Farsi language) or you may be confusing it with "fella", which just means a man (a casual way of saying "fellow")